Ichnofauna from the Harbans Bed of the Badhaura Formation (Sterlitmakian), Rajasthan, India
In the first ever systematic study of trace fossils from the Badhaura Formation, the authors described a nesting burrow, which they ascribed to a stomatopod. The purpose of this paper is two-fold: primarily, to document ichnofauna from (post-glacial marine late Palaeozoic rocks of peninsular India)...
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Veröffentlicht in: | Journal of Earth System Science 2014-03, Vol.123 (2), p.421-432 |
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Zusammenfassung: | In the first ever systematic study of trace fossils from the Badhaura Formation, the authors described a nesting burrow, which they ascribed to a stomatopod. The purpose of this paper is two-fold: primarily, to document ichnofauna from (post-glacial marine late Palaeozoic rocks of peninsular India) the Badhaura Formation (Sterlitmakian) representing marine rocks deposited following the Late Palaeozoic glaciation and secondly to contribute to the data on post-glacial ichnofauna from constituent continents of the Gondwanaland. Trace fossils described here are from the Harbans Bed, the topmost lithounit of the Badhaura Formation. The ichnofauna includes
Arenicolites tenuis, Beaconites
isp.,
Curvolithus
isp.,
Cylindrichnus concentricus
,
Didymaulichnus lyelli
,
Ophiomorpha
isp.,
Palaeophycus tubularis
,
Planolites beverleyensis
,
P. montanus
,
Rosselia chonoides
,
R. socialis
,
Skolithos linearis
,
Taenidium cameronensis
,
Thalassinoides paradoxicus
,
Thalassinoides
isp. and a flask-shaped brood chamber assigned to a stomatopod crustacean. This mixed assemblage is assigned to distal
Skolithos
ichnofacies and is suggestive of a period of relatively quiet, shallow water conditions of deposition. The ichnofauna, when viewed in context of peri-gondwanic ichnofaunas, mainly consisting of simple tracks and trails, from late Palaeozoic post-glacial deposits of other Gondwanan continents, is interesting due to dominance of domichnia. Profusion of brood chambers along with
Thalassinoides
in the Badhaura Formation validates the concept of pre-Mesozoic
Thalassinoides
being non-decapod in origin and suggestive of adaptive convergence. |
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ISSN: | 0253-4126 0973-774X |
DOI: | 10.1007/s12040-014-0406-3 |