Matches in SemOpenAlex for { <https://semopenalex.org/work/W1574167924> ?p ?o ?g. }
Showing items 1 to 55 of
55
with 100 items per page.
- W1574167924 endingPage "326" @default.
- W1574167924 startingPage "301" @default.
- W1574167924 abstract "Classical theories of marine chert formation formulated by land geologists who worked with older (Palaeozoic and Mesozoic) rock sequences have been considerably altered or updated by modern studies of younger (Tertiary) sediments of uplifted marginal basins and of present-day ocean basins where long sediment cores have encountered widespread cherts in incipient stages of development. Scanning electron microscopy, electron-microprobe, and X-ray analyses have enabled silica and carbonate migrational pathways during chertification to be traced in detail; nevertheless, questions such as silica sources for chertification (volcanic or biogenous) remain controversial. Both nodular and bedded cherts can form exclusively from biogenous silica as shown by a Southern Ocean Pliocene cristobalite ‘chert’ which grades into diatom ooze (ELTANIN Core 47–15). Unidimensionally disordered alpha-cristobalite, a metastable form of silica, is characteristic of incipient cherts, and forms the outer growth margins of developing chert nodules where the following complete transition can be observed: biogenous silica → cristobalite → true quartz chert. Such examples have elucidated not only modes of formation of deep-sea chert, but also of shelf and near-shore equivalents such as the cristobalite-rich Lower Tertiary sequences of the south-eastern U.S. Coastal Plain. Our studies indicate that chert formation can best be explained by a ‘maturation’ theory rather than the recently proposed ‘quartz precipitation’ theory, and that biogenous silica is by far the most important immediate silica source for oceanic cherts." @default.
- W1574167924 created "2016-06-24" @default.
- W1574167924 creator A5026016964 @default.
- W1574167924 creator A5090541519 @default.
- W1574167924 date "1975-01-01" @default.
- W1574167924 modified "2023-10-16" @default.
- W1574167924 title "Chertification of Oceanic Sediments" @default.
- W1574167924 doi "https://doi.org/10.1002/9781444304855.ch13" @default.
- W1574167924 hasPublicationYear "1975" @default.
- W1574167924 type Work @default.
- W1574167924 sameAs 1574167924 @default.
- W1574167924 citedByCount "4" @default.
- W1574167924 countsByYear W15741679242015 @default.
- W1574167924 crossrefType "other" @default.
- W1574167924 hasAuthorship W1574167924A5026016964 @default.
- W1574167924 hasAuthorship W1574167924A5090541519 @default.
- W1574167924 hasConcept C127313418 @default.
- W1574167924 hasConcept C13106087 @default.
- W1574167924 hasConcept C151730666 @default.
- W1574167924 hasConcept C17409809 @default.
- W1574167924 hasConcept C199289684 @default.
- W1574167924 hasConcept C2778644228 @default.
- W1574167924 hasConcept C2779870107 @default.
- W1574167924 hasConcept C2780490245 @default.
- W1574167924 hasConcept C2816523 @default.
- W1574167924 hasConcept C35066162 @default.
- W1574167924 hasConceptScore W1574167924C127313418 @default.
- W1574167924 hasConceptScore W1574167924C13106087 @default.
- W1574167924 hasConceptScore W1574167924C151730666 @default.
- W1574167924 hasConceptScore W1574167924C17409809 @default.
- W1574167924 hasConceptScore W1574167924C199289684 @default.
- W1574167924 hasConceptScore W1574167924C2778644228 @default.
- W1574167924 hasConceptScore W1574167924C2779870107 @default.
- W1574167924 hasConceptScore W1574167924C2780490245 @default.
- W1574167924 hasConceptScore W1574167924C2816523 @default.
- W1574167924 hasConceptScore W1574167924C35066162 @default.
- W1574167924 hasLocation W15741679241 @default.
- W1574167924 hasOpenAccess W1574167924 @default.
- W1574167924 hasPrimaryLocation W15741679241 @default.
- W1574167924 hasRelatedWork W1972562278 @default.
- W1574167924 hasRelatedWork W1994194533 @default.
- W1574167924 hasRelatedWork W2014798116 @default.
- W1574167924 hasRelatedWork W2020383694 @default.
- W1574167924 hasRelatedWork W2030407912 @default.
- W1574167924 hasRelatedWork W2337712059 @default.
- W1574167924 hasRelatedWork W2567485510 @default.
- W1574167924 hasRelatedWork W2911869918 @default.
- W1574167924 hasRelatedWork W3177469543 @default.
- W1574167924 hasRelatedWork W597461207 @default.
- W1574167924 isParatext "false" @default.
- W1574167924 isRetracted "false" @default.
- W1574167924 magId "1574167924" @default.
- W1574167924 workType "other" @default.