Rocks and Rock Minerals
A contemporary successor to the Louis V. Pirsson and Adolph Knopf editions, providing a guide and reference that explains how rocks occur, their commercial usage, and how to identify them through macroscopic, handspecimen features. Gives complete coverage of rock-forming minerals, rocks and man-made, rock-like materials, as well as meteorites, impactites, grossans, and more. Tables are provided for identifications based on megascopic examinations and simple field tests that require no sophisticated laboratory equipment. Plus, numerous illustrations represent rocks and rock-forming minerals as they appear in nature.
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The RockForming Minerals
Lesscommon Silicate Minerals with Sheet Structures
9 other sections not shown
aggregate albite alkali feldspar altered amphibole and/or anion anorthosites aphanites appear B. J. Skinner basaltic biotite breccias calcite carbonate cement chemical chert chlorite clay cleavage color commonly composition conglomerates constituents contain crystal form dark deposits diagenetic rocks distinguish dolomite dolostones epidote example faces feldspars feldspathoidal Felsics Figure fine-grained foliation fracture fragments gabbro garnet geologists glass gneisses grains granite granitoids gray green greenish hardness hematite hornblende igneous rocks iron lavas limestones luster mafic mafic minerals magma magnetite marbles masses material megascopic metamorphic rocks meteorites meters mica migmatites muscovite nepheline occur olivine origin oxidized pegmatites percent of feldspars peridotites phanerites phenocrysts plagioclase porphyries Precambrian prism pyrite pyroclastic rocks pyroxene quartz quartzites range rare recrystallization relatively common resemble sandstone schists sedimentary rocks sediments shales silicate solid solution specific gravity streak surface syenite talc temperature tend term tetrahedra texture tourmaline tuffs typically varieties vitreous