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NARROW
GeoRef Subject
-
all geography including DSDP/ODP Sites and Legs
-
Africa
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East Africa
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Sudan (1)
-
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Southern Africa
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Barberton greenstone belt (1)
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Kaapvaal Craton (1)
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South Africa (2)
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Antarctica
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Asia
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Yakutia Russian Federation
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Atlantic Ocean
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North Atlantic
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South Atlantic (1)
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Australasia
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Canada
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Ontario (1)
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Nunavut
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Western Canada
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Northwest Territories
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Chesapeake Bay impact structure (2)
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Chicxulub Crater (5)
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Commonwealth of Independent States
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Russian Federation
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Popigay Structure (2)
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Yakutia Russian Federation
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Ukraine
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Europe
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Umbria Italy
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Gubbio Italy (2)
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Ukraine
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Scandinavia
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Siljan Ring (2)
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Indian Ocean
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Ninetyeast Ridge (1)
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Mexico (2)
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North America
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Pacific Ocean
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polar regions (1)
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Death Valley National Park (1)
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Iowa
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hydrogen
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stable isotopes
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Cl-37/Cl-35 (1)
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Cr-53/Cr-52 (2)
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D/H (3)
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Fe-56/Fe-54 (1)
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Fe-57 (1)
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He-3 (4)
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Mg-25/Mg-24 (1)
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Mg-26 (1)
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Ne-21 (1)
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O-16 (1)
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O-17 (1)
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O-17/O-16 (2)
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O-18 (1)
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O-18/O-16 (5)
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Os-188/Os-187 (2)
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Pb-207/Pb-206 (1)
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Re-187/Os-188 (1)
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S-34/S-32 (1)
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Sr-87/Sr-86 (1)
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Xe-129 (1)
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metals
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potassium (1)
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alkaline earth metals
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strontium
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aluminum
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oxygen
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fossils
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Vertebrata
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Archosauria
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dinosaurs
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Invertebrata
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Protista
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microfossils (4)
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Plantae
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thallophytes (2)
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geochronology methods
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geologic age
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Tertiary
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Paleocene
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Mesozoic
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ureilite (3)
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Primary terms
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Africa
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Yakutia Russian Federation
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atmosphere (18)
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Canada
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carbon
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C-13/C-12 (2)
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Cenozoic
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Quaternary
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Holocene
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upper Holocene (1)
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Pleistocene
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upper Pleistocene (1)
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Tertiary
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lower Tertiary (8)
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Neogene
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Miocene
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Columbia River Basalt Group (1)
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upper Miocene (1)
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Paleogene
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Eocene
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upper Eocene (3)
-
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Paleocene
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lower Paleocene
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Danian (1)
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K-T boundary (9)
-
-
-
-
-
-
Chordata
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Vertebrata
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Tetrapoda
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Mammalia (1)
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Reptilia
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Diapsida
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Archosauria
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dinosaurs
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Saurischia
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Theropoda
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Coelurosauria
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Tyrannosauridae
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Tyrannosaurus
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Tyrannosaurus rex (1)
-
-
-
-
-
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-
-
-
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climate change (3)
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core (6)
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crystal chemistry (2)
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crystal structure (1)
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data processing (2)
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Deep Sea Drilling Project
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Leg 73
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Umbria Italy
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harzburgite (1)
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pyroxenite
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orthopyroxenite (1)
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volcanic rocks
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andesites
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basalts
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ocean-island basalts (1)
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inclusions
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interplanetary space (6)
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Invertebrata
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Protista
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isotopes
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radioactive isotopes
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I-129 (1)
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Re-187/Os-188 (1)
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-
stable isotopes
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Ar-36 (1)
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C-13/C-12 (2)
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Cl-37/Cl-35 (1)
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Cr-53/Cr-52 (2)
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D/H (3)
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Fe-56/Fe-54 (1)
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Fe-57 (1)
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He-3 (4)
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Mg-25/Mg-24 (1)
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Mg-26 (1)
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Ne-21 (1)
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Pb-207/Pb-206 (1)
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lava (1)
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magmas (6)
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mantle (10)
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Mesozoic
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Cretaceous
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Upper Cretaceous
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K-T boundary (9)
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upper Maestrichtian (1)
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Senonian (3)
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Turonian (1)
-
-
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Jurassic
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asteroids
Synthesis of ferrian and ferro-saponites: Implications for the structure of (Fe,Mg)-smectites formed under reduced conditions
Origin of Water in the Terrestrial Planets: Insights from Meteorite Data and Planet Formation Models
Ocean Worlds In Our Solar System
Water in Differentiated Planets, the Moon, and Asteroids
Recent Advances in our Understanding of Water and Aqueous Activity in Chondrites
Comparative morphometric analysis suggests ice-cored pingo-shaped landforms on the dwarf planet Ceres
A Halogen Record of Fluid Activity in the Solar System
Planetary Evaporation
An evolutionary system of mineralogy, Part V: Aqueous and thermal alteration of planetesimals (~4565 to 4550 Ma)
ABSTRACT Studies of impact structures in Sweden date back almost 60 years. They have so far resulted in the confirmation and understanding of eight impact structures and one impact-derived breccia layer, including the largest confirmed impact structure in the western part of Europe, the Siljan impact structure. Several additional structures have been proposed as impact derived, but they have to date not been confirmed. In this contribution, I summarize the current state of knowledge about the impact cratering record of Sweden. This is an up-to-date, comprehensive review of the features of known impact structures (and impact-related deposits) in Sweden. The described impact structures formed over a time period spanning from the Cambrian to the Cretaceous, and the preservation of several small (~1–2 km in diameter) Paleozoic impact structures indicates that the conditions securing their protection were close to optimal, with formation in a shallow epicontinental sea and rapid cover by protective sediments followed by a regional geologic evolution permitting their preservation. The generally well-preserved state of some of these crater structures contradicts the general assumption that such small impact structures can only be preserved for approximately a couple of thousand to a few million years. The Lockne-Målingen, Tvären, Granby, and Hummeln impact structures all have ages that place their formation in a period of proposed increased cratering rate on Earth following the breakup event of the L-chondrite parent body in the asteroid belt. However, to date, evidence other than a temporal correlation is missing for all of these structures except for Lockne (and Målingen), which has been shown to have formed by the impact of an L-chondritic body.
ABSTRACT There are currently 31 confirmed structures of impact origin in Australia. More than 49 additional structures have been proposed to have formed due to asteroid impact but await confirmation. Many discoveries have been made in Australia in the time since the last comprehensive review of the Australian impact cratering record was published in a peer-reviewed journal in 2005. These include further expanding the record of confirmed craters, and providing new insights into a variety of impact-related processes, such as shock deformation, phase transitions in accessory minerals, new impact age determinations, studies of oblique impacts, and more. This update is a review that focuses principally on summarizing discoveries made since 2005. Highlights since then include confirmation of five new Australian impact structures, identification of Earth’s oldest recognized impact structure, recognition of shock deformation in accessory minerals, discovery of the high-pressure phase reidite in Australia, determination of the links between impact craters and some ore deposits, and publication of the first generation of numerical hydrocode models for some Australian craters.