Sediment distribution German North Sea — classification according to FOLK (1954, 1974)
Description
The card in scale 1: 250,000 represents the sediment distribution according to FOLK (1954, 1974). This is based on a percentage distribution developed by FOLK (1974) of the three combined grain size fractions of gravel & stones, sand and silt, which are divided into 15 classes in a triangular diagram. The map is based on sediment samples from the seabed surface to a depth of 0.2 m as well as layer descriptions of holes at 0.2 m depth, which were available in the German North Sea region until November 2012. The basic data is stored in databases at the BSH and LBEG, and data collected in the future will be integrated into it.
The map shows areas of similar curler sediments on the surface of the seabed. Curler sediments are classified according to their grain sizes according to DIN EN 14688-1: Clay (grain size < 0.002 mm); Schluff (grain size 0.002 to 0.063 mm); Sand (grain size 0.063 to 2.0 mm); Gravel (grain size 2.0 to 63 mm); Stones and blocks (> 63 mm). On the basis of the grain size analyses carried out in the laboratory as well as the layer descriptions from bores, grain size ranges are summarised for relevant questions and then classified.
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Tags
- geologie
- inspireidentifiziert