Abstract
The aim of the present paper is to supply additional sedimentological observations and to add new details to the existing interpretation of the Atane Formation on eastern Disko. Examples of epsilon cross-bedding reflect formation of point bars and indicate intermittent development of sinuous channels in the coarse-grained braided river. Large tabularsets of planar cross-bedding are interpreted as transverse bars and the coalescerice of two such bars are discussed in detail. The field work was carried out during five days in July 1987 as part of a sedimentological research project supported by GGU and financed by SNF.
Highlights
White to paie yellow, slightly consolidated sand is widely exposed on eastern Disko below the Tertiary vo1canic rocks
The sand was deposited in 10-40 m thick sequences capped by relatively thin clay horizons and eventually by coal seams. Palaeobotanical studies of these indicate a late Cretaceous age (Miner, 1932) and the sand is referred to the Atane Formation (Henderson et al, 1976)
Classical point bar sequences (Allen, 1970) with pro- spread in current directions is noteworthy, as is the lack nounced fining-upward trends and capped by overbank of easterly directions
Summary
Slightly consolidated sand is widely exposed on eastern Disko below the Tertiary vo1canic rocks. The sand was deposited in 10-40 m thick sequences capped by relatively thin clay horizons and eventually by coal seams. Palaeobotanical studies of these indicate a late Cretaceous age (Miner, 1932) and the sand is referred to the Atane Formation (Henderson et al, 1976). 1) and suggested deposition by a sandy braided river. (1981) studied the Atane Formation at Pingo and Skansen They based their interpretation on the predominance of current-generated sedimentary structures, the
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