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Flynn Creek crater is a 3.8 km diameter, 360-million-year-old impact structure located in north central Tennessee, and is an invaluable terrestrial analog for the study of impact cratering dynamics. The Flynn Creek Crater Sample Collection consists of over two thousand boxes of drill core from 18 drill holes in the crater’s central uplift, floor, and rim. Impact-induced hydrothermal systems are of considerable scientific interest because they may have played a significant role in the origin and evolution of life on early Earth and produced temporary near-surface habitable environments on Mars. Between 1967 and 1979, USGS scientist Dr. David Roddy conducted a drilling program at Flynn Creek crater. The drilling...
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Shorebirds are among the most rapidly declining species in North America (Rosenberg et al. 2019), with many long-distance migrants experiencing the greatest declines (Environment Canada 2020). Nonetheless, not all shorebirds are declining and there may be differences among species and populations using different migratory routes. For instance, previous meta-analyses have suggested that shorebirds using the Mid-Continental Flyway are experiencing more rapid declines than those using the Pacific or Atlantic flyways (Thomas et al. 2006). At the same time, within a species, more northerly breeding populations are experiencing greater phenological mismatches and lower reproductive success than southerly ones (Kwon et...
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The Climate Adaptation Science Centers (CASCs) partner with natural and cultural resource managers, tribes and indigenous communities, and university researchers to provide science that helps fish, wildlife, ecosystems, and the communities they support adapt to climate change. The CASCs provide managers and stakeholders with information and decision-making tools to respond to the effects of climate change. While each CASC works to address specific research priorities within their respective region, CASCs also collaborate across boundaries to address issues within shared ecosystems, watersheds, and landscapes. These data represent the 9 CASC regions and the national CASC that comprise the CASC network, highlighting...
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Upland Sandpiper is one of many declining shorebird species (-4.6%/year in Alaska; Ziolkowski et al. 2023) which breed on military and adjacent lands in Alaska. Western and eastern populations are small and unstable, and the species is endangered at the state level in several eastern U.S. states (Houston et al. 2023). Though there has been considerable work with Upland Sandpipers in their core, central U.S. breeding areas, this is the first dedicated study of Upland Sandpipers in Alaska. The objectives are to resight, band, and track Upland Sandpiper at breeding sites in Delta Junction, AK and Donnelly Training Area (TA 501 & TA 511) to estimate vial rates, determine migratory connectivity, and determine important...
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The USGS Shoemaker collection is composed of impact crater rocks from Meteor Crater (AZ), Flynn Creek Crater (TN), Sierra Madera Crater (TX), Steinheim Crater (Germany), and several craters in Australia. Of special interest to planetary science are nine bags of fallback ejecta from the Meteor Crater interior. Also in the collection are igneous, sedimentary, and metamorphic rocks from South Africa, Australia, the San Francisco Volcanic Field, the Colorado Plateau, and many other locations throughout the U.S. The USGS Shoemaker Collection is an essential part of the legacy of Dr. Eugene Shoemaker, whose pioneering work in the 1960’s established the new field of astrogeology, including shock metamorphism studies, impact...
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Meteor Crater is a 180 m deep, 1.2 km diameter bowl-shaped impact crater in Northern Arizona, and has long been a terrestrial analog site for planetary exploration. During the 1960’s, Eugene Shoemaker trained NASA astronauts at the crater to prepare for the Apollo missions to the Moon. The Meteor Crater Sample Collection consists of geologic samples from the Meteor Crater ejecta blanket. USGS Astrogeology curates and provides access to the Meteor Crater Sample Collection for the planetary science community. Our goal is to facilitate scientific research on impact melting of sedimentary targets, ejecta distribution and deposition processes, and mineral shock metamorphism. The geologic samples in this collection were...
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Shorebirds are a group of predominantly migratory birds that are declining at an alarming rate; many of them have declined by more than 50% since 1970 and 13 are of federal conservation concern. With staggeringly long, trans-hemispheric migrations along each of North America’s migratory flyways — distinct corridors that divide North America longitudinally — shorebirds breeding in the Arctic and sub-Arctic and wintering in Central and South America encounter a multitude of threats during their annual cycles. This study aims to track the fall migration of a suite of species from their breeding sites across Alaska to the southern extent of their respective ranges and address how differences in migratory connectivity...
    map background search result map search result map Maps of the USGS Climate Adaptation Science Centers (May 2024) Terrestrial Analog Sample Collections: Meteor Crater Sample Collection Terrestrial Analog Sample Collections: Flynn Creek Crater Sample Collection Terrestrial Analog Sample Collections: Shoemaker Sample Collection New IGS Staff Report series publications Alaska Department of Defense Shorebird Migration Project 2021-Present Alaska Department of Defense Shorebird Migration Banding Data 2021-Present Alaska Department of Defense Migratory Movements Upland Sandpiper Study 2021-Present Alaska Department of Defense Shorebird Migratory Phenologies and Strategies Study 2022-Present Alaska Department of Defense Shorebird Migratory Phenologies and Strategies Proposal 2023 Alaska Department of Defense Shorebird Migration Resight Data 2022-Present Terrestrial Analog Sample Collections: Meteor Crater Sample Collection Terrestrial Analog Sample Collections: Flynn Creek Crater Sample Collection New IGS Staff Report series publications Alaska Department of Defense Shorebird Migration Project 2021-Present Alaska Department of Defense Shorebird Migration Banding Data 2021-Present Alaska Department of Defense Migratory Movements Upland Sandpiper Study 2021-Present Alaska Department of Defense Shorebird Migratory Phenologies and Strategies Study 2022-Present Alaska Department of Defense Shorebird Migratory Phenologies and Strategies Proposal 2023 Alaska Department of Defense Shorebird Migration Resight Data 2022-Present Maps of the USGS Climate Adaptation Science Centers (May 2024) Terrestrial Analog Sample Collections: Shoemaker Sample Collection