Environmental Engineering Reference
In-Depth Information
FIGURE 5.6
Phyllite schist showing strong platy
fabric that frequently results in unstable
slopes — note small fault (Ouro Preto,
M.G., Brazil).
TABLE 5.12
Metamorphic Derivatives of Igneous and Sedimentary Rocks
a
Parent Rock
Metamorphic Derivative
Sedimentary rocks
Conglomerate
Gneiss, various schists, metaconglomerate
Sandstone
Quartzite, various schists
b
Shale
Slate, phyllite, various schists
Limestone
Marble
b
Igneous rocks
Coarse-grained feldspathic, such as granite
Gneiss, schists, phyllites
Fine-grained feldspathic, such as felsite and tuff
Schists and phyllites
Ferromagnesian, such as dolerite and basalt
Hornblende schists, amphibolite
Ultramafic, such as peridotite and pyroxene
Serpentine and talc schist
a
After Pirsson, L.V. and Knopf, A.,
Rocks and Rock Minerals
, Wiley, New York, 1955. Reprinted
with permission of Wiley.
b
Depends on impurities.
PLATE 5.20 (
Color Plate 5.20
follows
page 396.)
Hornblende GNEISS with phenocrysts
of feldspars (Rio de Janeiro, Brazil).
