Where: Andhra Pradesh, India (17.2° N, 77.9° E: paleocoordinates 29.3° S, 58.4° E)
• coordinate estimated from map
• small collection-level geographic resolution
When: Maastrichtian (72.1 - 66.0 Ma)
• Upper Cretaceous continental sediments are exposed along the perimeter of the Deccan Traps in peninsular India. The thick sequences stratigraphically below the Deccan basalts and usually deposited on Archaean granite (peninsular gneiss complex) of Gondwana Group are known as Infratrappean (=Lameta Formation) beds. They are generally considered fluvio-lacustrine coastal plain deposits (Mohabey & Udhoji 1993). The thin (1-5 m) sediminstary beds between basal flows are known as Intertrappean (=Takli Formation) beds. These sedimentary beds are generally considered to have formed by the sudden blocking of the drainage system immediately after the eruption of the Deccan volcanic basalt, resulting in the formation of enclosed basins, separated by interfluvial divides (Rana 1990a). Both the Infra- and Intertrappean beds under study are considered Maastrichtian in age on paleontological, geochronological, and paleomagnetic data (see Khajuria et al 1994 for a review).
•The fossiliferous units are situated between salt flows 4 and 5 (sensu Dutt 1975).
Environment/lithology: fluvial-lacustrine; black, brown marl and gray, white marl
•Fresh water ostracodes, charophytes, and molluscs were recovered from the white marl, black brown marl, and whitish-grey marl beds. Microvertebrates, including mammals, were recovered from the black-brown marl and whitish-grey marl beds (Rana 1988, 1990a,b).
Size classes: macrofossils, mesofossils
Collected by R. S. Rana in 1986, 1995-1998
Collection methods: bulk, sieve,
• ITV/R collection: Intertrappean vertebrates/Rangapur in the Department of Geology, HNB Garhwal University, Srinigar, Uttaranchal, India
Primary reference: R. S. Rana. 1990. Palaeontology and palaeoecology of the Intertrappean (Cretaceous-Tertiary transition) beds of the peninsular India. Journal of the Palaeontological Society of India 35:105-120 [M. Carrano/M. Carrano]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 122240: authorized by Roger Benson, entered by Roger Benson on 19.12.2011, edited by Philip Mannion and Matthew Carrano
Creative Commons license: CC BY (attribution)