palaeocurrent

(redirected from paleocurrents)

palaeocurrent

(ˈpælɪəʊˌkʌrənt)
n
(Geological Science) geology an ancient current, esp of water, evidence of which has been preserved in sedimentary rocks as fossilized ripple marks, etc
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References in periodicals archive ?
The oncolitic packstone facies (F1) is arranged in decimeter to meter thick massive beds (up to 2.40 m) with occasional and poorly-preserved large-scale cross-bedding (paleocurrents towards the E-NE, Fig.
A., 1990, Changes in paleocurrents during the development of an Obliquely convergent plate boundary, Sulaiman fold - belt, south western Himalayas, west-central Pakistan.
However, because the rocks have been modified by tectonic strain, the measured crests of ripples have almost certainly been rotated towards the long axis of the bedding-plane strain ellipse, creating a more tightly clustered distribution; removal of tectonic strain provides a better picture of the scatter of paleocurrents (e.g., Waldron and Jensen 1985; Waldron 1988; Gingras et al.
1, 2) coincide with the Western High Antarctica Zone and Eastern High Antarctica Zone (Marques & Pena Cantero, 2010), and may be due to variations in depth, present oceanic currents and paleocurrents of the SO (Marques & Pena Cantero, 2010).
The occurrence, degree, and mean direction of a shape preferred orientation of elongated particles ("shape-fabric") has been accepted to be a primary indicator of the paleocurrents and flow rheology assessments (Capaccioni et al., 1997).
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.
The Pottsville Group of eastern Pennsylvania is wedge-shaped (300 m thick on the east and thinning westward), and consists of fluvial deposits with westerly paleocurrents (Meckel 1967; Robinson and Prave 1995).
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.
Facies distribution and paleocurrents indicate some of the basins were halfgraben structures.
Changes in paleocurrents during the development of an obliquely convergence plate boundarySulaiman foldbelt southwestern Himalaya west central Pakistan.