Publication details

Vývoj ledovcových sedimentů na kontaktu s žulovským masivem ve Štachlovicích u Vidnavy

Title in English Development of glacigenic sediments on contact with Žulová batholith in Štachlovice by Vidnava town


Year of publication 2016
Type Article in Periodical
Magazine / Source Geologické výzkumy na Moravě a ve Slezsku
MU Faculty or unit

Faculty of Science

Field Geology and mineralogy
Keywords Pleistocene, continental glaciation, glacitectonite, subglacial cavity infill, supraglacial melt-out till, terminoglacial stream sediments, drumlin, Žulová Upland
Description The investigated outcrop represents the development of glacigenic sediments on rugged topography of the Žulová Upland. Investigated locality is situated on a hill located on the northern margin of the Žulová Upland. It is located near Štachlovice, the local part of the Vidnava town. The granitoid basement is in places formed by elevations covered by glacigenic sediments. The height of elevation reaches 350 cm in outcrop, or ca. ~400 cm according to the GPR survey. The glacitectonite, formed on the gentle side of elevation, is composed of angular blocks of granitoids of the Žulová batholith, diamicton, sand, gravel and deformed glacifluvial sand. The glacitectonite was deposited during the advance of the continental glacier. The original subglacial cavity is enclosed by a steep side of the elevation. This cavity is filled by foreset body composed of stratified sand and gravel and nonstratified gravelly sand, gravel and diamicton. The cavity was filled during deglaciation in subglacial environment. The glacitectonite underlies the diamicton (supraglacial till) that was deposited as a debris flow during the retreat of the continental glacier. Unsorted gravel overlaps with erosional base the infill of the cavity, this gravel has a huge extent according to the GPR survey. This sediment represents the environment of terminoglacial stream. The gravel material of all types of glacigenic sediments is mainly composed of rocks from the Rychleby Mts., quartz, and Nordic and Polish rocks. The locality represents preglacial elevation of bedrock, which was glacitectonically deformed during the glaciation. The formation of these sediments took place in environment analogous to environment of part bedrock/part till drumlin.

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