CMS60

Celebrating ASU history: Carleton Moore, meteorites and moon rocks

Looking back at history-making chemistry that's out of this world

October 6, 2021

It was 60 years ago, in 1961, and the space race was on. Soviet cosmonaut Yuri Gagarin became the first man in space, followed weeks later by American astronaut Alan Shepard. President John F. Kennedy challenged the nation to land a man on the moon by the end of the decade.

Arizona State University’s opportunity to become part of the nation’s space program began when it purchased the largest personal meteorite collection at the time from Harvey Nininger. Nininger’s meteorite collection, consisting of samples from nearly 600 localities, was housed and studied at ASU’s newly formed Center for Meteorite Studies, one of the university’s first research institutes.

To direct the center, ASU courted a recent PhD graduate from the California Institute of Technology, Carleton Moore. Moore, at the time, was teaching at Wesleyan University in Connecticut. On behalf of ASU, Herbert G. Fales flew to Connecticut to recruit Moore.

CB Moore
Emeritus Regents Professor Carleton Moore, the founding director of the Center for Meteorite Studies at ASU. Photo courtesy of J. Wardarski/The State Press
Moore recalled, “I was interested in the position, but I wanted to come to Arizona to see the university before accepting. At the time, it was unheard of for prospective faculty to want to come and visit the school, so I don’t think they really knew what to do with me. They gave me a nice tour, and then George Bateman, chair of the division of physical sciences, took me to dinner at the local bowling alley.”

The Center for Meteorite Studies was originally located in the Department of Chemistry (today the School of Molecular Sciences). One of Moore’s first tasks as director was to organize a symposium on meteorite research to celebrate the inauguration of ASU’s new president, G. Homer Durham.

“Durham was a wonderful guy,” Moore said. “He saw that ASU had to grow, so he was very supportive of our research.”

Research at the Center for Meteorite Studies grew throughout the 1960s, as did Moore’s skill and reputation. Prior to the first moon landing in 1969, Moore was accepted by NASA to chemically analyze lunar samples brought back to Earth by the astronauts. A little over 50 years ago, on the evening of Oct. 7, 1969, history was made at ASU in the C-wing of the physical sciences building when Moore, together with colleague Charles Lewis and graduate student Robert Kelly, obtained the first measurements of carbon in a lunar sample.

Click here to continue reading at ASU News!

James Klemaszewski
Science writer, School of Molecular Sciences

 

 

CMS60: The oldest sedimentary rock in the Solar System is a meteorite

In 2017, Center Meteorite Curator Dr. Laurence Garvie published a ground-breaking paper in the journal Icarus. Co-authored with former Center Assistant Director and astrophysicist Dr. Melissa Morris and School of Earth and Space Exploration Professor (now Emeritus) and sedimentologist Dr. Paul Knauth, the paper (Sedimentary laminations in the Isheyevo (CH/CBb) carbonaceous chondrite formed by gentle impact-plume sweep-up) was a true interdisciplinary effort.

"I still remember being blown away by the first photo I saw online – It was astonishing. What was this sedimentary material? I had never seen anything like that before in a meteorite. It looked like a well- sorted sediment.”

Isheyevo meteoriteIsheyevo was the first meteorite to show prominent macroscopic sedimentary laminations and, so far, remains the only meteorite that provides evidence of gentle layer-by-layer accretion in the early Solar System. This extends the terrestrial sedimentary source-to-sink paradigm to a near vacuum environment where neither fluvial nor aeolian processes operate.

“Isheyevo is the Solar System’s oldest sedimentary rock, having formed just a few million years after the formation of the oldest objects in our Solar System, the CAIs, and is way older than the oldest Earth rock."

Morris' astrophysical modeling was key to bringing the formational history to light and to understanding the physics under which this rock could have formed, and Knauth's insights into terrestrial sedimentary formation scenarios added crucial context to how this rock had formed billions of years ago on an extraterrestrial body.

"I am often asked “what is your favorite meteorite?” Being the curator, I have thousands to choose from, but I always point to Isheyevo.”

Read more about Isheyevo’s formational history:

Morris, M.A., Garvie, L.A.J . and Knauth, L.P. (2015) New insights into the Solar System’s transition disk phase provided by the metal-rich carbonaceous chondrite Isheyevo. Astrophysical Journal Letters 801(2), L22.

Garvie, L.A.J., Knauth, L.P., and Morris, M.A. (2017) Sedimentary laminations in the Isheyevo (CH/CBb) carbonaceous chondrite formed by gentle impact-plume sweep-up. Icarus. 292:36-47.

 

 

CMS60: Dishchii’bikoh Ts’iłsǫǫsé Tsee

To celebrate of 60 years of the Center for Meteorite Studies, we’re posting stories of historical Center events, new research initiatives, exciting outreach programs, conservation and growth of the Center’s invaluable meteorite collection. We invite you to follow us on social media, and share your memories and photos of the Center for Meteorite Studies using #CMS60.
During the early morning hours of June 2, 2016, a bright fireball was widely observed throughout the southwestern US, generating radar reflections consistent with falling meteorite material. Analysis of Doppler radar data showed that stones had likely landed on the southwestern corner of the White Mountain Apache tribal (WMAT) lands.
 
With the help of Jacob Moore (Assistant Vice-president of Tribal Relations at ASU), permission was granted by Ronnie Lupe, the WMAT Tribal Chairman, to enter the tribal lands and search for and collect meteorites. Center Meteorite Curator Laurence Garvie began searching the rugged, mountainous terrain of the WMAT for meteorites, along with (former ASU PhD Candidates, now alumni) Daniel Dunlap, and Prajkta Mane. After over 130 hours of meteorite hunting in remote Arizona backcountry, their efforts were rewarded and they ultimately recovered 15 stones.
 
Upon his return to ASU, Garvie immediately began the work of classifying this new meteorite. Given the name Dishchii’bikoh Ts’iłsǫǫsé Tsee by the White Mountain Apache Tribe, it was determined to be an LL7 chondrite, the fourth witnessed meteorite to fall in Arizona.
 
Dishchii’bikoh Ts’iłsǫǫsé Tsee remains the property of the WMAT, and will be curated in perpetuity by the ASU Center for Meteorite Studies.
Dishchii'bikoh meteorite in the field
Dishchii'bikoh meteorite in the field. Photo: ASU/CMS.

 

 

 

 

 

 

Bringing the Moon to Arizona

To celebrate of 60 years of the Center for Meteorite Studies, we’re posting stories of historical Center events, new research initiatives, exciting outreach programs, conservation and growth of the Center’s invaluable meteorite collection. We invite you to follow us on social media, and share your memories and photos of the Center for Meteorite Studies using #CMS60.

As implied by its name, research at the Center for Meteorite Studies focuses in large part on meteorites, most of which originated on asteroids. However, the Center also supports research on other Solar System bodies such as the Sun, Moon and Mars. The practice of working on planetary samples other than meteorites was established in the early history of the Center when Founding Director Carleton Moore was among the handful of scientists in the world selected to analyze Moon samples returned by the Apollo missions.

The seeds of Moore’s Apollo analyses were planted years before the Moon landings. As newly-appointed Director of CMS, Moore attended a conference of meteorite curators in England in 1962. There, metallurgist Howard Axon suggested that carbon contents of meteorites should be studied, as theoretical work on iron and steel carried out by metallurgists could benefit from carbon values from meteorites.

Chuck Lewis in the lab
Chuck Lewis with the LECO gas chromatograph. Photo: ASU/CMS.

Inspired by the suggestion, Moore obtained a state-of-the-art LECO carbon analyzer, which operated by combusting a sample and then analyzing the resulting products by gas chromatography. Moore and CMS Curator Charles Lewis began by analyzing carbon in iron meteorites and, once they successfully demonstrated the technique, they moved onto analyzing a wide variety of chondrite meteorites. The expertise developed with carbon enabled Moore, Lewis and the increasing numbers of undergraduate and graduate researchers in the CMS to move onto the characterization of other volatiles in meteorites including nitrogen and sulfur. Their work resulted in numerous publications and established the reputation of the CMS in studies of volatile elements in meteorites

Prior to the first Moon landing, Moore’s successful meteorite analyses helped earn him a grant from NASA to analyze carbon in the samples returned by the first lunar landing mission, Apollo 11. This work was independent of the Lunar Sample Preliminary Examination Team (LSPET), the team of scientists assigned to analyze the samples in the Lunar Receiving Laboratory (LRL) at the Manned Spacecraft Center (MSC; now known as Johnson Spaceflight Center) immediately upon return of the lunar samples to Earth. However, when carbon analyses of the Apollo 11 samples by the LSPET were unsuccessful, Robin Brett, a NASA geochemist in charge of science at the MSC, brought Moore onto the LSPET immediately to get the needed carbon data. Because the CMS was the only facility with the analytical machinery in place for proven carbon analyses, Moore flew to Houston to pick up the Apollo 11 samples and brought them back to ASU for analysis.

L-R Carleton B. Moore, Charles Lewis, Everett Gibson
Photo: Moore, Lewis and Gibson (left to right) pose in front of their analytical setup in the Lunar Receiving Laboratory in Houston. Image ⓒ ASU/CMS.
On the evening of Tuesday, October 7, 1969, Moore, Lewis, a LECO salesperson (Mitch Schwartz), and a graduate student (Bob Kelly), crowded into the CMS lab to conduct the first carbon analysis of a lunar sample. The late start time was to ensure that they would not be interrupted by any of the usual daytime university business. The first sample analyzed was of the lunar regolith. Moore vividly remembers when the counter on the LECO analyzer began to register a reading. His overwhelming emotion was relief – there was carbon to be had in the lunar samples and they were analyzing it! Each person in attendance signed the analysis log book at 9:30 PM to commemorate the event. Analyzing samples with detectable carbon in them in their first effort built the group’s confidence in their methods, but it was also fortuitous. Samples return by later missions, like the lunar highlands materials predominantly consisting of anorthosite collected by Apollo 16, were nearly devoid of carbon. Such a null result early on might have proved confusing or disheartening.

As the Apollo 11 analyses were underway at the CMS, the rapidly approaching launch of Apollo 12 compelled Moore to work quickly to recreate the analytical setup from the CMS at the LRL so that his future LSPET analyses could be done in Houston. The samples that the LSPET were charged with analyzing were chosen by the curatorial staff at the MSC after they cataloged the samples returned by each mission. When an important sample or suite of samples was identified, it was released to the LSPET members for analysis. The cataloging and release process could take months; thus, some LSPET members would stay in Houston until all the preliminary analyses were completed for a mission’s samples. Rather than follow this model, Moore traveled to Houston for each sample release, leaving on a Friday night and returning on a Sunday night so as not to affect his Center directorship and teaching duties. After Apollo 14, the lunar samples were no longer deemed a potential biological hazard because the likelihood of lunar organics or life forms was eliminated by analyses of the Apollo 11, 12 and 14 samples. Moore and his team could then carry out the carbon analyses for LSPET on the Apollo 15, 16 and 17 samples at ASU.

Moon in transit 1969
Carleton Moore and Everett Gibson transporting Apollo lunar samples to ASU. Photo: Jan Young.

Security around the lunar samples was understandably tight. The Apollo 15, 16 and 17 samples and other samples Moore was authorized to analyze through his own grants were mailed from the MSC but Moore had to pick them up directly from the post office. Once at ASU, the samples were kept in a cabinet secured with two locks from a single vendor designated by NASA. The lock did not come with a set combination. Moore was required to set the combination himself so that he would be the only one capable of opening the lock. NASA also required that the samples be checked by law enforcement personnel twice a day so that in the event the samples went missing, the time of disappearance would be tightly constrained. During late nights of work by Moore and his students, though, they often found that the nighttime sample check was not done. Fortunately, additional security for the cabinet was provided as only the Center could. Moore kept heavy iron meteorites in the base of the storage cabinet to ensure it could not be moved.

Moore and the CMS team ultimately analyzed over 200 lunar samples. These analyses, along with discussions with ASU Department of Geology colleague Jack Larimer as well as the data from other LSPET researchers, helped Moore and his team understand the sources of lunar carbon. Specifically, they found that carbon from cosmic rays and solar wind is implanted into the lunar surface samples. The analyses of Apollo samples not only bolstered the reputation of the CMS as a research center, they also set the precedent for the study of all types of planetary materials by CMS researchers in the future.

Learn more about the Center for Meteorite Studies' history-making Apollo analyses here!

Watch an archived interview with Center Founding Director Prof Carleton B. Moore, here!

This post by Michelle Minitti originally appeared in the CMS newsletter, and is updated here.

Historic Center Research: Murchison

To celebrate of 60 years of the Center for Meteorite Studies, we’re posting stories of historical Center events, new research initiatives, exciting outreach programs, conservation and growth of the Center’s invaluable meteorite collection. We invite you to follow us on social media, and share your memories and photos of the Center for Meteorite Studies using #CMS60.

The Murchison meteorite fall of 1969 was one of the most scientifically important in human history.  This carbonaceous (CM2) chondrite was witnessed entering Earth's atmosphere the between 10:45 and 11:00 AM on September 28th, in Victoria, Australia.  The meteorite broke up as it fell, and several fragments were recovered, totalling over 100 kg (220 lb). Some specimens landed on a road, but the largest recovered piece fell through a roof, into some hay.

Murchison fell shortly after brand new clean laboratories were assembled in anticipation of the Apollo lunar sample return mission, providing a contaminant-free environment in which to study this organic-rich meteorite.

It was by studying Murchison that a team of researchers including Center Founding Director Dr. Carleton B. Moore discovered the first evidence of extraterrestrial amino acids in 1970 (Kvenvolden et al.). A later study showed evidence for the presence of important components of DNA and RNA, called nucleobases, in Murchison (Martins et al., 2008), and the findings of a 2018 paper authored by ASU Emeritus Professor Sandra Pizzarello and Dr. Christopher Yarnes suggest that chiral molecules necessary for life may have come to Earth via meteorites such as Murchison.

Photo ⓒ ASU/CMS/D. Ball.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fifty years after its fall, the Murchison meteorite remains one of the most studied space rocks, and is still the subject of active research at ASU. 

In a recent video produced by National Public Radio's Science Friday, Center Meteorite Curator Dr. Laurence Garvie discusses the importance of meteorites, including Murchison, and even describes the meteorite's particular odor – click here to watch.

Founded on philanthropy

In 1957, Sputnik’s launch put space exploration at the forefront of the American conscience. The following year, Harvey H. Nininger, the famous meteorite hunter and self-taught meteoriticist, sold a portion of his collection to the British Natural History Museum.

The Coordinator of Research at Arizona State University, George A. Boyd, was familiar with Nininger's collection and recognized its importance to Arizona and to ASU's pursuit of research in an up-and-coming discipline. Boyd, working with the chair of the Chemistry Department, Clyde A. Crowley, and ASU President, Grady Gammage, solicited a grant from the National Science Foundation (NSF) in order to purchase the remainder of Nininger's collection and bring it to ASU.

To bolster its proposal, ASU offered supporting funds from both the ASU Foundation and from Mr. Herbert G. Fales, then vice president of International Nickel Company (Inco), who was familiar with Nininger through his own interest in meteorites. The NSF also recognized the importance of keeping the remainder of Nininger's collection in the United States and accepted the ASU proposal on June 8, 1960.

Acting on behalf of ASU, Mr. Fales traveled to Connecticut's Wesleyan University to recruit Dr. Carleton B. Moore as director of the newly formed Center for Meteorite Studies and the rest, as they say, is history!

Carleton B. Moore
ASU Center for Meteorite Studies founding director Carleton B. Moore. Photo ASU/CMS.

 

This post by Michelle Minitti originally appeared in the CMS newsletter, and is updated here.

Researcher Spotlight: Devin Schrader

Get to know Center researchers with this periodic feature!

Dr. Devin Schrader is the Interim Director of the ASU Center for Meteorite Studies (CMS) and an Associate Professor in the School of Earth and Space Exploration (SESE). His research focuses on the study of primitive meteorites thDevin Schraderat have remained relatively unaltered since they formed in the early Solar System ~4.5 billion years ago. He also works on samples returned from asteroids, including those returned from asteroid Itokawa by the Japanese Space Agency (JAXA), and is a collaborator on NASA’s OSIRIS-REx asteroid sample return mission.
 
Schrader, a native to Arizona, grew up in the boondocks where the night skies were clear and the constellations were rarely obscured.
Photo: D. Schrader.
 
That led to an interest in stars and a love of astronomy. I had a telescope as a kid and would spend hours on the garage roof with it, staring into space. But it wasn’t until grade school, when I was about 12 or 13 years old, that I realized you could hold space rocks in your hand. I was fascinated.
 
Schrader’s fascination with meteorites led him to become a regular visitor to the world-renowned Tucson Gem and Mineral show (held every February in Tucson, Arizona) where he had the chance to see an incredible array of meteorites. Meanwhile, the University of Arizona’s (UA) reputation for astronomy research enticed him to become a Wild Cat while he pursued a double major in Physics and Astronomy.
 
I loved astronomy and thought I wanted to be an astronomer. I was fascinated by meteorites but I didn’t know that studying them was an actual career until I did a NASA Space Grant internship classifying meteorites. That made me realize that I could apply my physics and astronomy background to the study of meteorites.
 
Following rewarding and fascinating internships with both Prof. Dante Lauretta (PI of the OSIRIS-REx asteroid sample return mission) at UA and Prof. Harold Connolly Jr. at the American Museum of Natural History, Schrader stayed at UA for graduate school and worked with both Dante and Harold.
 
During grad school, I had the opportunity to work with primitive meteorites, specifically CR chondrites, which represent the earliest stages of our solar system’s history. If you want to understand why our solar system looks like it does today, you have to understand what it formed from. These 4.5 billion year old rocks give us the best opportunity to do that.
 
After graduating with a Ph.D. in 2012, Schrader became a postdoctoral fellow at the University of Hawaiʻi at Mānoa and then the Smithsonian’s National Museum of Natural History. Schrader worked with Dr. Tim McCoy, the Smithsonian’s Curator of Meteorites; together they provided sample science support for the OSIRIS-REx asteroid sample return mission.
 
Working with Tim was a dream come true. He’s a leader in his field and I learned a lot from him. Tim encouraged me to diversify and work on a whole range of other meteorite types, including primitive achondrites. We also worked on the OSIRIS-REx mission together – that was a lot of fun. It’s been amazing to watch the mission progress and I can’t wait to see the samples return from asteroid Bennu in 2023.
 
Schrader became a Sun Devil in Summer 2015, when he joined the Center for Meteorite Studies as Assistant Director and Assistant Research Professor; he is now the Interim Director of CMS and an Associate Research Professor.
 
The Center for Meteorite Studies at ASU is an amazing place to work. In the vault, we have meteorites that represent every stage of Solar System history. It’s a researcher’s dream. And we’re ideally situated to interact with the local community through events in the School for Space and Earth Exploration.
Devin SchraderCurrently, Schrader is focused on using isotopic and compositional analyses to determine the chemistry of the protoplanetary disk and trace migration of material in the early Solar System. This recently led Schrader to analyze grains returned from asteroid Itokawa by the Hayabusa mission and he hopes to analyze more returned samples in the coming years.
 
For his contributions to planetary science and the OSIRIS-REx mission, Schrader has an asteroid named after him; you can find his name sake, Asteroid 117581 Devinschrader (2005 EG37), in the asteroid belt.
 
Learn more about Dr. Schrader’s research here: https://meteoriticist.com/
 
Watch a tour of the Meteorite Vault by Dr. Schrader and Dr. Davidson here: https://meteorites.asu.edu/collection
 
In the news:
Fragments of asteroids may have jumped the gap in the early solar system https://meteorites.asu.edu/news/gap
New paper on cosmochemistry advances from Antarctic meteorites! https://meteorites.asu.edu/news/antmet
Acapulcoite-lodranite meteorite group https://meteorites.asu.edu/news/aclo-paper
CR chondrite metamorphism https://meteorites.asu.edu/news/cr-met
Background temperature of the protoplanetary disk https://meteorites.asu.edu/news/new-paper
 
Recent publications:
Schrader D. L., Nagashima K., Davidson J., McCoy T. J., Ogliore R. C., and Fu R. R. (2020) Outward migration of chondrule fragments in the Early Solar System: O-isotopic evidence for rocky material crossing the Jupiter Gap? Geochim. Cosmochim. Acta 282, 133–155.
 
Fu R. R., Kehayias P., Weiss B. P., Schrader D. L., Bai X.-N., and Simon J. B. (2020) Weak magnetic fields in the outer solar nebula recorded in CR chondrites. Journal of Geophysical Research: Planets 125, e2019JE006260.
 
Wadhwa M., McCoy T. J., and Schrader D. L. (2020) Advances in cosmochemistry enabled by Antarctic meteorites. Annual Review in Planetary Science 48, 233–258.
 
Davidson J., Schrader D. L., Alexander C. M. O’D., Nittler L. R., and Bowden R. (2019) Re-examining thermal metamorphism of the Renazzo-like (CR) carbonaceous chondrites: Insights from pristine Miller Range 090657 and shock-heated Graves Nunataks 06100. Geochimica et Cosmochimica Acta 267: 240–256.
 
McCoy T. J., Corrigan C. M., Dickinson T. L., Benedix G. K., Schrader D. L., and Davidson J. (2019) Grove Mountains (GRV) 020043: Insights into acapulcoite-lodranite genesis from the most primitive member. Geochemistry 79(4): 125536.
 
Written by
Dr. Jemma Davidson
Assistant Research Scientist
Center for Meteorite Studies
School of Earth and Space Exploration
Arizona State University

Water on Mars

Center Assistant Research Scientist Dr. Jemma Davidson is lead author of a new paper on Mars' water, published in the journal Earth and Planetary Science Letters.

Davidson’s recent work involves tracing magmatic volatiles, specifically hydrogen, in minerals in meteorites and terrestrial analogues to learn about how the terrestrial planets gained their water. 

Dr. Jemma Davidson holds a piece of NWA 7034
Dr. Jemma Davidson holds a piece of NWA 7034, a martian polymict-breccia.

In this new paper, Davidson and her ASU School of Earth & Space Exploration co-authors present the results of coordinated hydrogen isotope and water content analyses of phosphate grains from the martian polymict breccia meteorite Northwest Africa 7034 (aka Black Beauty). The study provides insight into the complex history of the martian crust, including impact and magmatic processes, and crustal fluid exchange.

Constraining the abundances and isotopic compositions of volatile elements on Mars is key to understanding the origin of Mars’ water and the evolution of its mantle, crust, hydrosphere, and atmosphere,” says Davidson. “Studying hydrogen is crucial to understanding how planets and moons evolve and to determining how the terrestrial planets gained their water.

The study focuses on Northwest Africa (NWA) 7034 from the ASU Center for Meteorite Studies collection, which is one of the most important meteorites discovered in the last decade. Indeed, NWA 7034 and its paired meteorites more closely resemble the composition of the martian crust than any other meteorite found to date.

Northwest Africa 7034 is an extremely important meteorite because it gives us a way to investigate Mars’ crust in the lab,” says Davidson. “Until robotic missions return samples from Mars in the coming decades, martian meteorites continue to provide the only way for us to get our hands on the Red Planet.

Read the full paper, here!

Dr. Davidson works in collaboration with SESE Director Prof. Meenakshi Wadhwa; they were recently awarded a NASA Solar System Workings grant to apply their studies of volatiles to lunar meteorites and samples returned by the Apollo missions. This work will aim to further our understanding of the source and evolution of water in the Moon and the terrestrial planets.

Learn more about Dr. Davidson's research, here!

Davidson J., Wadhwa M., Hervig R., and Stephant A. (2020) Water on Mars: Insights from apatite in regolith breccia Northwest Africa 7034. Earth and Planetary Science Letters 552, 116597. https://doi.org/10.1016/j.epsl.2020.116597
PDF
 

This video was made from CT scans of a slice (45 mm x 55 mm x 4 mm) of the NWA 7034 (AKA “Black Beauty”) Martian meteorite from the ASU Center for Meteorite Studies collection. This meteorite is a polymict breccia containing a diverse assemblage of igneous and “sedimentary” materials. It was most likely produced by impact, but also involved volcanic and low-temperature alteration processes. The bulk chemical composition of this meteorite closely matches that of the Martian crust as measured by NASA’s Mars Exploration Rovers and Mars Odyssey Orbiter. It also contains the most amount of water (approximately ~0.6 wt%) of any of the known Martian meteorites. The CT imaging of this meteorite slice was performed at the American Museum of Natural History, New York.

Fall and classification of the Aguas Zarcas meteorite

Laurence Garvie Aguas Zarcas
Center Meteorite Curator Laurence Garvie holds a piece of the Aguas Zarcas meteorite that hit a dog house in Costa Rica. Photo: ASU/CMS/E. Garvie.
Center for Meteorite Studies Meteorite Curator Laurence Garvie is featured in a new article published in the journal Science on the meteorite Aguas Zarcas.

Aguas Zarcas is a carbonaceous (CM2) meteorite that fell in Costa Rica April 23, 2019. One 280 g (approx 10 oz) piece struck a dog house, and another 1152 g (approx 2.5 lb) piece left a hole the size of a grapefruit in the roof of a nearby house.

From the Meteoritical Bulletin (MB108):

At 21:07 local time on 23 April 2019, a meteorite fall was reported in Aguas Zarcas, San Carlos county, Alajuela province, Costa Rica. The fireball traveled WNW to ESE and was caught on cameras of the National Seismological Network (RSN) at the summit of Poás and Turrialba volcanoes, and from the Volcanological and Seismological Observatory of Costa Rica (OVSICORI). Sightings were reported from Quepos (Central Pacific) in the south and north to La Palmera in San Carlos.

Click here to see additional photos and learn more about this fascinating new meteorite, including its fall and recovery in Costa Rica, and its classification at ASU!

Aguas Zarcas meteorite
Fusion-crusted individual piece of Aguas Zarcas. Top right of stone shows dirt from its impact with the Earth. Photo: ASU/CMS/L. Garvie.