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- Title
LARGE PEBBLES (BOULDERS) IN THE GRAVELS OF THE COTMEANA PIEDMONT.
- Authors
Flori, CULESCU; Monica, GHENCIU
- Abstract
During the field researches, the pebbles of the Cotmeana Piedmont gravels were described using the following terms: boulders, for pebbles with dimensions of 20-50 cm, coarse gravels, with pebbles of 10-20 cm, gravels, with pebbles of 3-10 cm, small gravels, with pebbles of 1-3 cm and fine gravels, with pebbles under 1 cm. Boulders were found in 21 observation points, 8 on the north-eastern edge of the piedmont and 13 on its western edge. By order of frequency, the petrographic types of boulders are quartzo-feldspathic gneisses, quartzites, siliceous rocks, quartz, pegmatites, amphibolites, eclogites, augen-gneisses, red sandstones, rhyolites, granites and granodiorites. Specific for the western zone are the red sandstones, amphibolites and jasper boulders. Boulders of rhyolites and augen-gneisses appear only in the north-eastern zone. The presence of boulders in the north-eastern part of the piedmont is explained by the proximity of this zone to the Subcarpathian and Carpathian source areas, but their presence in the southwestern zone is somewhat surprising, this zone being further from these source areas. The boulders along the western edge represent the clastic material input of a torrent river with high transport power (the Olt paleo-River).
- Subjects
SILICEOUS rocks; PEBBLES; BOULDERS; GRAVEL; ECLOGITE
- Publication
Oltenia, Studii si Comunicari Seria Stiintele Naturii, 2021, Vol 37, Issue 1, p13
- ISSN
1454-6914
- Publication type
Article