Flagging
发表于 2025-3-28 17:25:18
The Stratigraphic Record of Impact Events: A Short Overview,cal and atmospheric processes on our planet can obscure or erase the impact record in geologically short times. Impact craters are recognized from the study of actual rocks — remote sensing can only provide supporting information. Petrographic studies of rocks at impact craters can lead to the disco
割让
发表于 2025-3-28 20:38:34
Application of stratigraphic nomenclature to terrestrial impact-derived and impact-related materialssing in detail how extant stratigraphic nomenclature of the North American Commission on Stratigraphic Nomenclature and the International Subcommission on Stratigraphic Classification may apply to these materials. In the course of the review and discussion, we cite relevant examples and make some r
Induction
发表于 2025-3-28 23:08:37
Main Geochemical Signatures Related to Meteoritic Impacts in Terrestrial Rocks: A Review,ver, small quantities of vaporized and molten meteorite material mixed with them significantly alter the concentrations and ratios of certain elements and isotopes. The identification of this meteoritic signature is used to propose an impact formation for structures of uncertain origin, as well as a
crockery
发表于 2025-3-29 04:27:59
Impact Decompression Melting: A Possible Trigger for Impact Induced Volcanism and Mantle Hotspots ? to auto-obliterate the crater. Decompression melting of the sub-crater mantle may initiate almost instantaneously, but the effects of such a massive melting event may trigger long-lived mantle up-welling or an impact plume (I-plume) that could potentially resemble a mantle hotspot. The energy relea
AGGER
发表于 2025-3-29 08:52:19
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易受骗
发表于 2025-3-29 15:08:12
Obscure-bedded Ejecta Facies from the Popigai Impact Structure, Siberia: Lithological Features and scribed. These deposits are distinct from other rock facies of the crater fill due to obscure bedding (or unclear layering), poor or moderate sorting, and some other specific lithological features (character of debris, presence of accretionary lapilli etc). Three types of such ejecta facies occur in
Soliloquy
发表于 2025-3-29 19:23:43
Biostratigraphic Indications of the Age of the Boltysh Impact Crater, Ukraine,cture with a central uplift (average diameter ~ 4 km). The annular trough around the uplift is filled with predominantly glassy impactites (impact melt rocks = tagamites) that are up to 230 m thick. The crater lake sediments overlie impactites and are represented by laminated siltstones, sandstones,
喃喃而言
发表于 2025-3-29 23:34:41
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FECT
发表于 2025-3-30 01:41:34
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pacific
发表于 2025-3-30 05:34:45
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