Ad
related to: brecciated jasper information
Search results
Results from the WOW.Com Content Network
Jasper, an aggregate of microgranular quartz and/or cryptocrystalline chalcedony and other mineral phases, [1] [2] is an opaque, [3] impure variety of silica, usually red, yellow, brown or green in color; and rarely blue. The common red color is due to iron(III) inclusions. Jasper breaks with a smooth surface and is used for ornamentation or as ...
Breccia is composed of coarse rock fragments held together by cement or a fine-grained matrix. [5] Like conglomerate, breccia contains at least 30 percent of gravel-sized particles (particles over 2mm in size), but it is distinguished from conglomerate because the rock fragments have sharp edges that have not been worn down. [6]
The dominant lithology of the Torridon Group is red and brown sandstone, often arkosic, with subsidiary amounts of shale, particularly towards the top of the sequence, with coarse conglomerates and breccias locally at the base.
Orbicular jasper from Madagascar. Orbicular jasper is a variety of jasper which contains variably-colored orbs or spherical inclusions or zones. In highly silicified rhyolite or tuff, quartz and feldspar crystallize in radial aggregates of needle-like crystals which provide the basis or seed for the orbicular structure seen in this kind of jasper. [1]
Outcrop of Franciscan radiolarian chert in San Francisco, California Radiolarian chert outcrop near Cambria, California.Individual beds range from about 2 to 5 cm thick Radiolarite from the Alps.
Get breaking news and the latest headlines on business, entertainment, politics, world news, tech, sports, videos and much more from AOL
The footwall can transport mylonitic gneisses from lower crustal levels to upper crustal levels, where they become chlorititic and brecciated. [5] The hanging wall, composed of extended, thinned and brittle crustal material, can be cut by numerous normal faults.
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
Ad
related to: brecciated jasper information