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Title Facies mosaic in a fiord: Carboniferous-Permian Talchir Formation, India
Creator/Author Bose, P.K. ; Mukhopadhyay, G. ; Bhattacharya, H.N.
Publication Date1988 Jan 01
OSTI IdentifierOSTI ID: 6639072
Report Number(s)CONF-880301-
Resource TypeConference
Specific TypeBook
Resource RelationAnnual meeting of the American Association of Petroleum Geologists; 20 Mar 1988; Houston, TX, USA
Subject020200 -- Petroleum-- Reserves, Geology, & Exploration ;030200 -- Natural Gas-- Reserves, Geology, & Exploration; INDIA-- NATURAL GAS DEPOSITS;INDIA-- PETROLEUM DEPOSITS;NATURAL GAS DEPOSITS-- GEOLOGY;PETROLEUM DEPOSITS-- GEOLOGY; EXPLORATION;FIORDS;GEOLOGIC HISTORY;GEOPHYSICS;MISSISSIPPIAN PERIOD;OCEANOGRAPHY;PENNSYLVANIAN PERIOD;PERMIAN PERIOD;SANDSTONES;SEDIMENTATION;SEDIMENTS
Related SubjectASIA;DEVELOPING COUNTRIES;ESTUARIES;GEOLOGIC AGES;GEOLOGIC DEPOSITS;MINERAL RESOURCES;PALEOZOIC ERA;RESOURCES;ROCKS;SEDIMENTARY ROCKS;SURFACE WATERS
Description/Abstract Facies analysis of the basal 37m of the Carboniferous-Permian Talchir Formation is a glacier-fed bedrock trough in Dudhi nala, Bihar, India, provides insight into the pattern of sedimentation of course gravels in a fiord.^ Rapid transitions between 11 recognized facies, together with their complex organization, random variability in bed thickness, and differences in clast, shape, size, and composition indicate coalescence of fans developed from numerous point sources bordering the elongated trough.^ Converging slide masses and lodgment tillites on the slopes flanking the trough give way to sediment gravity flow deposits composed of an array of conglomerates (matrix and clast supported with normal, inverse of absence of grading), attendant turbidite sands, and prodelta mud.^ The rheology of the in-trough flows ranged from plastic laminar to fluidal turbulent in response to flow from slope to floor of the trough.^ Rapid calving of icebergs during the onset of deglaciation established a wave regime at the mouth of the trough and deposited cross-stratified sandstone replete with dripstones.^ The impact of large dripstones landing triggered turbidity currents.^ Continued rise in water level led to eventual preservation of the fan complex under onlapping wave-built shoal facies that grade into a sequence of upward-thinning hummocky cross-stratified sandstone beds virtually devoid of dripstones.
PublisherAmerican Association of Petroleum Geologists,Tulsa, OK
Country of PublicationUnited States
LanguageEnglish
FormatPages: 31
AvailabilityAmerican Association of Petroleum Geologists, P.O. Box 979, Tulsa, OK 74101.
System Entry Date2001 May 13

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