[b]Sedimentary cycles in the Callovian-Oxfordian of the Jaisalmer Basin, Rajasthan, western India[/b]

Apply

[b]Sedimentary cycles in the Callovian-Oxfordian of the Jaisalmer Basin, Rajasthan, western India[/b]

Journal Title: Volumina Jurassica - Year 2010, Vol 8, Issue 1

Abstract

The Callovian and Oxfordian marine sediments of the Jaisalmer Basin constitute the uppermost part of the Jaisalmer Formation, which comprises the Kuldhar and Jajiya members. In the present paper the authors illustrate retrogradational-progradational, more or less symmetrical cycles representing low- to high-energy marine environments. Despite an incomplete sedimentary record in a profile disrupted by a number of omission surfaces, it is possible to distinguish seven such sedimentary cycles in less than 24 m of sedimentary succession. The cycles, often bearing in their upper parts a thick-bedded well-cemented calcareous sandstone/pack- to rudstone, or hummocky cross-stratified beds indicative of storm events, are occasionally topped by hardgrounds. Hardgrounds provide well-defined boundaries useful for delineating correlative/bounding surfaces, identified here with sequence boundaries (3rd order cycles). Maximum flooding surfaces characterized by richly fossiliferous marly wackestones provide additional correlative horizons. Within these sequences, subordinate cycles can be tentatively distinguished, some of them may represent parasequences. The stratigraphical significance of correlative surfaces and sequences is tested by their fossil content, and these surfaces can be used for regional correlations with neighbouring basin.

Authors and Affiliations

Dhirendra K. PANDEY, Jingeng SHA, Shipra CHOUDHARY

Keywords

EFEKTY ORGANIZACYJNE I MENEDŻERSKIE WSPÓŁDZIAŁANIA ORGANIZACJI

Artykuł zawiera omówienie zagadnień związanych ze współdziałaniem organizacji. W publikacji autorka zaprezentowała przede wszystkim wyniki badań własnych dotyczących form współdziałania organizacji. Na podstawie przeprow...

Importance of the Mellala section (Traras Mountains, northwestern Algeria) for the correlation of the Pliensbachian-Toarcian boundary

In the Mellala profile, located in the Traras Mountains (Tlemcen Domain, NW Algeria), the hemipelagic Bayada Fm. includes the transition from the Pliensbachian to the Toarcian within a continuous succession of alternatin...

EP ID EP67937
DOI 10.5604/17313708 .1114485
Views 46
Downloads 0