Greywacke or graywacke (German: Grauwacke 'a grey, earthy rock') is a variety of sandstone generally characterized by its hardness (6–7 on Mohs scale)...

a distinctive type of glacial erratic that consists of dark siliceous greywacke and exhibits prominent rounded, often deep, hemispherical voids and pits...

The greywacke zone is a band of Paleozoic metamorphosed sedimentary rocks that forms an east-west band through the Austrian Alps. The greywacke zone crops...

goddess standing, greywacke, in Boston Mus. 09.200. Nome triad, King, Hathor-Mistress-of-the-Sycomore and Theban nome-god standing, greywacke. (Now in Cairo...

The Green Caesar is a portrait of Julius Caesar made of green Egyptian greywacke, kept in the Antikensammlung Berlin, which was likely made in the first...

and tawa, and was a home for birds such as kererū, tūī, kākā and kiwi. Greywacke from the ranges was a source for many stone tools used by Hauraki Māori...

characteristic shape of ribs of hard greywacke with narrow gaps where mudstone was worn away, and fragments of greywacke lay on the surface as a talus deposit...

The Boston Green Head is a greywacke sculptured head of an Egyptian priest from the Late Period of ancient Egypt. The head is dated to 380–332 BC and...

in the Greywacke stratum in North Devon, England. De La Beche was claiming that since Carboniferous fossils were found deep in the Greywacke stratum...

of the site. It has at least 6 surrounding terraces and a quarries for greywacke and conglomerate La Torre - La Jarena is described as the largest megalithic...

on the limestone platform at Norber near Settle." Many of the Silurian greywacke boulders at the site are perched on pedestals of limestone up to 30cm...

been quarried from the nearby Greenheugh Bay[citation needed] and of the greywacke rock also used in the drystone dyke forming the field boundaries. It is...

mine in this region. The Wadi Hammamat was a notable source of granite, greywacke, and gold. Flint was the first mineral collected and used to make tools...

western extent of the assemblage. The Franciscan Complex is dominated by greywacke sandstones, shales and conglomerates which have experienced low-grade...

In Austria, the Eastern Alps are divided into the Northern Alps, the Greywacke zone, the Central Alps and the Southern Alps. The latter lie partly in...

legitimise his rule over Egypt religiously. Except for the small-scale greywacke statue in the Metropolitan Museum of Art, which shows Nectanebo II standing...

Prior to that time, mudstone and hardened sandstones commonly known as greywacke was deposited and deformed by tectonic movement. Following the split from...

terrains where chemical weathering is subordinate to physical weathering. Greywacke sandstones are a heterogeneous mixture of lithic fragments and angular...

Dynasty. Tjahapimu is archaeologically attested by statue made from meta–greywacke which was unearthed at Memphis and is now exhibited at the Metropolitan...

tholeiitic pillow basalts and minor porphyritic felsic flows. Siltstone, greywacke, iron formation, ferromanganiferous shale and chert represent minor rocks...

marginal and shallow sea. This has meant that slates, sandstones and greywackes are the most abundant rock types in the Sauerland. In some areas limestones...

greywacke occurring here and at other places in the eastern Hintertaunus cannot or can hardly be distinguished from the Carboniferous Kulm greywacke and...

Trechtingshausen's limits is the stoneworks, which quarries quartzitic greywacke from a strip mine and processes it. The strip mine's roots go back to...

The Kensington Runestone is a slab of greywacke stone covered in runes that was discovered in Western Minnesota, United States, in 1898. Olof Ohman, a...

are still being worked; Arcow and Dry Rigg quarries produce gritstone (greywacke), and Horton Quarry produces limestone. The dale was historically in the...

Rakaia, Aspiring and Pahau terranes and the Esk Head Belt. Greywacke (or Torlesse Greywacke) is the dominant rock type of the composite terrane; argillite...

described by Geoff Patterson in 1997. It favours rocky habitats, particularly greywacke screes. Threats to scree skinks include predation by introduced mammals...

Crossgates Quarry2 Ribblehead Quarry2 Sandsend Ness4 Scotgate Ash Quarry1 Threshfield Quarry2 Notes 1: Sandstone 2: Limestone or chalk 3: Greywacke 4: Alum...

was further south. There is also the Greywacke zone, which is a narrow strip of Palaeozoic sediments (greywackes, shales and limestones and others). It...

side, and kayakers can also land. The island is formed from quartzite, greywacke, and some sandstone, and has soils based on glacial drift. It is home...