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Arecaceae; Assam; India; Late Oligocene; Makum Coalfield; fossil palms; Tikak Parbat Formation; northeast India.

Two new palm leaf impressions, cf. Iguanura wallichiana and Palmacites makumensis sp. nov. are described from the Makum Coalfield, Tinsukia District, Assam. They belong to the Tikak Parbat Formation being considered as Late Oligocene (Chattian 28–23 Myr) in age. Their presence, along with the other known fossil records indicates that CMMT (cold month mean temperature) was not less than 18°C with plenty of rainfall, in the region during the period of deposition.

Gaurav Srivastava¹ R C Mehrotra¹ Hugues Bauer²

1. Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow 226 007, India.
2. Bureau de Recherche G´eologiques et Mini`eres (BRGM) Regolith and Reservoir Geology Division, 3 Avenue C. Guillemin, BP 36009, 45060 Orl´eanscedex 2, France.

Published

June 2012

Manuscript received

8 September 2011

Manuscript revised

28 December 2011

Accepted

8 January 2012