Lakhmirani, Kutch (Eocene of India)

Where: India (23.6° N, 68.6° E: paleocoordinates 0.7° S, 60.1° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Naredi Formation, Ypresian (56.0 - 47.8 Ma)

• All the specimens come from a limestone studded with Assilina (foraminifer) in the middle part of the formation (Assilina Limestone Member of Biswas, 1992). Assilina limestone is early Ypresian, on the basis of dinoflagellates such as Muratodinium fimbriatum (Garg et al., 2011). Larger foraminifera from the Assilina Limestone Member indicate N. burdigalensis cantabricus, SBZ11, middle Cuisian (Punekar and Saraswati 2010).

• group of beds-level stratigraphic resolution

Environment/lithology: lagoonal or restricted shallow subtidal; lithified, shelly/skeletal marl

• The Naredi Formation was deposited in a marginal marine environment (Biswas, 1992; Mukhopadhyay and Shome, 1996a,b). The Gypseous Shale unit developed in a low energy restricted environment of a barrier–lagoon–swamp complex (see also Biswas, 1992; Mukhopadhyay and Shome, 1996a,b). According to Garg et al. (2011), deposition of the Assilina Limestone took place in upper neritic conditions with reduced supply of terrigenous clastic sediments from land, leading to development of foraminiferal banks in the shallow embayment. There are two shallowing upward cycles (foraminiferal shale - foraminiferal carbonate). Partly, deposition took place near wave base, leading to winnowing of fine-grained sediments and concentration of larger foraminifers. Chattoraj et al. (2009) assigned water depths of <30 m for the Assilina limestone, on the basis of the faunal assemblage, which contains Assilina spinosa, Nummulites burdigalensis and small rotalids and is devoid of planktonic foraminifera. Overlying unit represents supratidal conditions.
• Assilina rich yellowish to gray marls with yellowish to dirty white hard carbonate bands containing Nummulites.

Size class: macrofossils

Preservation: mold/impression

Collected by K. Halder

Primary reference: K. Halder. 2012. Cenozoic fossil nautiloids (Cephalopoda) from Kutch, western India. Palaeoworld 22(2):116-130 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 165879: authorized by Matthew Clapham, entered by Kristina Okamoto on 30.01.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Nautilida - Hercoglossidae
Deltoidonautilus vredenburgi n. sp.
Deltoidonautilus vredenburgi n. sp. Halder 2012