It led up stairs of graywacke, along the brink of slaty cliffs that dropped sheer, hundreds of feet to the stream below. From Wordnik.com. [The Rim of the Desert] Reference
Ecoregion 66c is underlain by Precambrian metamorphic rock, including quartzite, graywacke, and conglomerate of the Lynchburg Formation. From Wordnik.com. [Ecoregions of Delaware, Maryland, Pennsylvania, Virginia, and West Virginia (EPA)] Reference
It wasn't made of plastic, but exquisitely carved out of graywacke, the same stone as used for the Narmer Palette, which is similar to slate but has a finer grain. From Wordnik.com. [Interactive Dig Hierakonpolis - Narmer's Temple Week 4] Reference
A fragment of an exquisitely carved graywacke vase proved there had been a royal presence -- such stone vessels were products of royal workshops in the early First Dynasty. From Wordnik.com. [Interactive Dig Hierakonpolis - Narmer's Temple Week 4] Reference
Parts of the Danville Basin, on the other hand, are higher and have more relief than adjacent portions of the Piedmont because they are underlain by relatively resistant rocks including conglomerate and graywacke (Hack, 1982; Virginia Division of Mineral Resources, 1993). From Wordnik.com. [Ecoregions of Delaware, Maryland, Pennsylvania, Virginia, and West Virginia (EPA)] Reference
Is it primitive, or is it graywacke like Catskill Mountains?. From Wordnik.com. [Personal Memoirs of a Residence of Thirty Years with the Indian Tribes on the American Frontiers] Reference
I received a specimen of slaty graywacke from Lake Superior. From Wordnik.com. [Personal Memoirs of a Residence of Thirty Years with the Indian Tribes on the American Frontiers] Reference
Cruachan more to the quick, had he known all about geology, gneiss, and graywacke, and the Silurian system?. From Wordnik.com. [Spare Hours] Reference
File: Volcaniclastic graywacke turbidites in Descon Formation. jpg | Volcaniclastic graywacke turbidites in Descon Formation. From Wordnik.com. [CreationWiki - Recent changes [en]] Reference
The so-called 'transition rocks', in the two divisions of upper and lower graywacke (silurian and devonian systems), the latter being formerly designated as old red sandstone. From Wordnik.com. [COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1] Reference
Those streams which originate in, or run through districts of granite, limestone, graywacke, &c., present pebbles of these respective rocks abundantly along their banks, at points below the termination of the fixed strata. From Wordnik.com. [Personal Memoirs of a Residence of Thirty Years with the Indian Tribes on the American Frontiers] Reference
It would not be very surprising, therefore, as is well observed by the distinguished geognosist, Von Dechen, if we were to meet with a fragment of gneiss formed on the walls of a smelting furnace which was built of argillaceous slate and graywacke. From Wordnik.com. [COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1] Reference
By his acute discovery of the arrangement of the lobes of their chamber-sutures, Leopold von Buch has been enabled to divide the innumerable quantity of Ammonites into well-characterized families, and to show that Ceratites appertain to the muschelkalk, Arietes to the lias, and Goniatites to transition limestone and graywacke. From Wordnik.com. [COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1] Reference
'Kuppe', near Eschwege, on the banks of the Werra; and in the Druidical stone on the Hollert road (Siegen), where the basalt has broken through the variegated sandstone and graywacke slate, and has spread itself into cup-like fungoid enlargements, which are either grouped together like rows of columns, or are sometimes stratified in thin laminae. From Wordnik.com. [COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1] Reference
S. 427, where there is a drawing of the porphyry spheres between which jasper occurs, in the calcareous graywacke of Bogoslowsk, being produced by the Plutonic influence of the augitic rock; bd. ii., s. 545; and likewise. From Wordnik.com. [COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1] Reference
The lives of saints form one of the most curious subjects for the historian, and still more for the student of language; and the day, no doubt, will come when it will be possible to take those wonderful conglomerates of fact and fiction to pieces, and, as in one of those huge masses of graywacke or rubblestone, to assign each grain and fragment to the stratum from which it was taken, before they were all rolled together and cemented by the ebb and flow of popular tradition. From Wordnik.com. [Chips From A German Workshop. Vol. III. Essays on Literature, Biography, and Antiquities] Reference
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