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  Are meandering structures found in proterozoic rocks of different ages of the Vindhyan supergroup of central India biogenic?: A scrutiny
 
 
Titel: Are meandering structures found in proterozoic rocks of different ages of the Vindhyan supergroup of central India biogenic?: A scrutiny
Auteur: Chakrabarti, A.
Verschenen in: Ichnos
Paginering: Jaargang 8 (2001) nr. 2 pagina's 131-139
Jaar: 2001-06
Inhoud: Sinuous structures preserved in ripple troughs are recorded from strata of different ages, ranging from 1100 Ma to Late Riphean, of the Vindhyan Supergroup of central India. These have been previously interpreted as trace fossils, namely Cochlichnus anguineus Hitchcock. Detailed examination of these features precludes their categorization as trace fossils. These structures are probably related to synaeresis. Final outflow of water from ripple troughs during emergence may have played an important role in the initiation and distribution of these interpreted shrinkage cracks and the meandering structures possibly reflect the principal direction of tension. Identification of such dubiotraces in Proterozoic rocks might sharpen our awareness regarding the exact time of metazoan evolution.
Uitgever: Taylor & Francis
Bronbestand: Elektronische Wetenschappelijke Tijdschriften
 
 

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