Titlebook: Impact Markers in the Stratigraphic Record; Christian Koeberl,Francisca C. Martínez-Ruiz Book 2003 Springer-Verlag Berlin Heidelberg 2003

Galactogogue

Ejecta of the Boltysh Impact Crater in the Ukrainian Shield,he crater. The thickness of the suevite layer varies from a few meters to up to 97 m in the eastern part of the crater..The Boltysh ejecta were deposited on top of Precambrian crystalline basement of the Ukrainian Shield over almost the entire extent of the ejecta blanket. Only within the nearby, ab

連系

一小塊

New Geochemical Insights from Electron-Spin- Resonance Studies of Mn2+ and SO3- in Calcites: Quantil three of these sites, anomalies in SO.. and/or Mn. intensities are noted at the KT boundary relative to the corresponding background levels in the rocks above and below. At Caravaca, the SO.. background itself is found to be lower by a factor of 2.7 in the first 30,000 years of the Tertiary relati

MOT

Petrography and Geochemistry of a Deep Drill Core from the Edge of the Morokweng Impact Structure, lithological sections are unshocked and generally undeformed (with exception of several narrow cataclastic zones that were probably formed prior to the impact event). Several thick sections of felsic granophyric rocks of granitic mineralogical and chemical composition are texturally very similar to

Cholagogue

Stratigraphy, Paleomagnetic Results, and Preliminary Palynology across the Permian-Triassic (P-Tr) Tr boundary interval. Our results suggest that the extinction of mammal-like reptiles at the end of the Permian may have preceded the fungal event and land-plant extinction within an interval of less than ~100,000 years, and possibly less than ~25,000 years..Paleomagnetic data confirm multiple magne

Geyser

Search for an Extraterrestrial Component in the Late Devonian Alamo Impact Breccia (Nevada): Resultometry after neutron activation. The results vary between 19 and 51 ppt iridium, and indicate only minor possible Ir enrichment in the matrix and lapilli clasts compared to the background sample. The lapilli samples averaged slightly higher Ir values than the matrix. Because these are carbonate samp

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anniversary

紅潤

水汽