Depositional environment of the Fort Member of the Jurasic Jaisalmer Formation (western Rajasthan, India), as revealed from lithofacies and grain-size analysis
Ahmad, F. (Aligarh Muslim University. Department of Geology)
Quasim, M. A. (Aligarh Muslim University. Department of Geology)
Ghaznavi, A. A. (Aligarh Muslim University. Department of Geology)
Khan, Z. (Aligarh Muslim University. Department of Geology)
Ahmad, Abul Hasnat Massod (Aligarh Muslim University. Department of Geology)

Date:	2017
Abstract:	Lithofacies and granulometric analysis were carried out to decipher the depositional environment of the Fort Member of the Jurassic Jaisalmer Formation. Based on field data nine lithofacies have been identified including trough cross-bedded sandstones, planar cross-bedded sandstones, matrix supported conglomerates, thinly bedded siltstone and sandstones, herringbone cross-bedded sandstones, wave rippled sandstones, laminated sandstones, hummocky cross-bedded sandstones, limestones and shales. Granulometric analysis of the sandstones samples has been carried out for their statistical and textural parameters. Bivariant plots of textural parameters such as graphic skewness versus graphic standard deviation and kewness versus standard deviation confirm the high energy (beach) origin of sandstones. These results suggest a wide spectrum of marine environments ranging from inner shelf to upper shoreface for the Fort Member sandstones.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre i quan aquestes es distribueixin sota la mateixa llicència que regula l'obra original i es reconegui l'autoria.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Lithofacies ; Grain-size analysis ; Depositional environment ; Shallow marine ; Fort member ; Jurassic
Published in:	Geologica acta, Vol. 15 Núm. 3 (september 2017) , p. 153-167, ISSN 1696-5728

Adreça alternativa: https://raco.cat/index.php/GeologicaActa/article/view/328011
Adreça alternativa: https://revistes.ub.edu/index.php/GEOACTA/article/view/GeologicaActa2017.15.3.1
DOI: 10.1344/GeologicaActa2017.15.3.1

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