paleocurrent


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paleocurrent

[¦pāl·ē·ō′kə·rənt]
(geology)
Ancient fluid current flow whose orientation can be inferred by primary sedimentary structures and textures.
References in periodicals archive ?
However, the result of the paleocurrent analysis of the foreset of cross bedded units is well pronounced in the Ajali Sandstone and less pronounced in the Mamu Formation (this may be due to the presence of siltstone, shale and coal in Mamu and complete absence in Ajali sandstone).
The paleocurrent analysis result shows that the variance value is 1,472.
Other field data includes sedimentary structures, paleocurrent measurements, and detailed grain-size measurements from certain beds.
The linguoid ripple shapes are heavily modified by strain; judging the original line of symmetry to estimate paleocurrent orientations is impossible.
This change is consistent with paleocurrent analysis based on clast imbrication in six beds of this section, which show a strong component of southeastward transport (Fig.
Paleocurrent data indicate a northwestward paleoflow (Waldron 1987, 1988; Waldron et al.
The earliest sediments deposited in the Central Maine Basin were derived from Laurentia whereas the uppermost formations preserve paleocurrent indicators from the east, suggesting an outboard source thought to be Avalonia (Hanson and Bradley 1989; Hanson et al.
The discovery of ten small carbonate buildups, one of which was large enough to affect paleocurrents during and after burial, demands revision of Chesterian paleoenvironmental interpretations in north Alabama.
On the basis of facies patterns and paleocurrents, none of these basins seem to show an influence by orogenic topography, suggesting that it was essentially removed by the time of deposition of these basins.
Facies distribution and paleocurrents indicate some of the basins were halfgraben structures.