How To Use Wall rock In A Sentence
-
The wall rocks to the pegmatites consist of a sequence of mafic volcanics and gabbroic intrusive bodies.
Marketwire - Breaking News Releases
-
The white material is quartz and the black is the wall rock from the edge of the vein.
-
The wall rocks are usually strongly altered and in part are replaced by some of the above minerals, forming coarse-grained rocks which are called "greisen.
The Economic Aspect of Geology
-
The gossan is likely to resist erosion and to be conspicuous at the surface, -- though this depends largely on the relative resistance of the wall rocks, and on whether the gangue is a hard material like quartz, or some material which weathers more rapidly like limestone or igneous rock.
The Economic Aspect of Geology
-
The paper carefully analyzes bolt supporting system, and measures the parameters of coal wall rock in Fuxin diggings .
-
The wall rocks have undergone a "propylitic" alteration, with development of chlorite, epidote, and probably sericite, much as at Butte.
The Economic Aspect of Geology
-
In igneous rock the ore-bearing solutions may have altered the wall rock to a dense mixture of quartz, sericite, and chlorite.
The Economic Aspect of Geology
-
The mineralized vein was less than 2 feet wide, and the old stopes show extensive support timbering, necessary because of fracturing and extensive alteration of adjacent wall rock.
-
Magmas concentrate metals, and magma fluids traveling into the surrounding wall rock plant the seeds for mineral growth.
-
The dykes and sheets sharply truncate structures in the wall rock gneisses and greenstones, and large (several tens of metres) wall-rock xenoliths may be completely engulfed by the intrusive sheets.
-
The wall rocks have undergone a "propylitic" alteration, with development of chlorite, epidote, and probably sericite, much as at Butte.
The Economic Aspect of Geology
-
The wall rock was highly altered and consisted of a groundmass of pyrophyllite and fine-grained pyrite.
-
Xenoliths, which are pieces of wall rock, or xenocrysts, which are single mineral grains that originate from xenoliths, can commonly be recognized at outcrops of magmatic rocks.
-
Magmas concentrate metals, and magma fluids traveling into the surrounding wall rock plant the seeds for mineral growth.
-
Xenoliths, which are pieces of wall rock, or xenocrysts, which are single mineral grains that originate from xenoliths, can commonly be recognized at outcrops of magmatic rocks.