Greywacke or graywacke (German grauwacke, signifying a grey, earthy rock) is a variety of sandstone generally characterized by its hardness, dark color...

and 19 February 2013, it was part of the town Quedlinburg. There is a grauwacke quarry here which is also checkpoint 61 on the Harzer Wandernadel. Gesetz...

The Rothaeuser Grauwacke Formation is a geologic formation in Germany. It preserves fossils dating back to the Devonian period. Earth sciences portal...

Almut Gross, Konkret Literatur 1997 (in German) Autonome in Bewegung, AG Grauwacke aus den ersten 23 Jahren, Association A 2003 (in English) Galimberti,...

for years the site of protests and violence during May Day rallies. Grauwacke, AG, "We Will Disrupt this Conference: Resistance to the 1988 IMF and...

pre-quaternary rocks c. 290 million years (Brocken granite) Type of rock Paleozoic sedimentary, metamorphic and magmatic rocks – mainly slate, grauwacke, granite...

des Steinkohlengebirges. Bonn 1847 Scanned book Ein Seestern aus der Grauwacke. In: Verhandlungen des naturhistorischen Vereines der preussischen Rheinlande...

(1893). Another work is Beiträge zur Kenntniss der Fauna der Siegenschen Grauwacke (1892). Kayser Bjerg, a mountain in Greenland, was named after him. Kayser...

made of limestone, four hundred metres high, that stands atop base of grauwacke and primary rock (Urgestein - quartz phyllite). The Rettenstein is the...

an unstable wall foundation as a result of variable rock weathering: soft shale between harder grauwacke. Site: Ediger Elzhofberg. Photo Bernd Ternes...