Gneiss /ˈnaɪs/ is a common and widely distributed type of rock formed by high-
grade ... It has occurred in English since at least 1757. ... The appearance of
layers, called compositional b...
In this outcrop you see a sequence of sandstone layers. ... The blue-grey rock is a
fine sandstone that has been broken into angular pieces in .... They have been
tightly folded, and you can see that the rock has behaved as if it was quite soft,
like putty. ... The light streaks are feldspar and quartz, the dark bands are mica
You must say if you are a teacher. ... (dark rocks) Extrusive Igneous Rock Color:
black or dark. Streak: Layers: ... Color: always going to be grey (light or dark) ...
Other: sometimes has bands (stripes) of different colored minerals caused by the
www.mrcollinson.ca/4 science/rocks and minerals/4_science_rocks_minerals_rock_characteristics_answers.pdf
If your thoughts are different, see if you can rationally figure out ... Flat Layers -
Sedimentary rocks are formed from small pieces of rock that rest at the bottom of
... These rocks may have alternating bands of light and dark minerals, or may be.
This causes the minerals in the original rock to reorient themselves with the long
and ... crystals are larger with the grains aligned in parallel to subparallel layers
... pressures; coarse grained texture of alternating light and dark mineral bands.
Owing to the fact that shales are the most abundant sedimentary rock (60% of all
... results in light and dark colored minerals being concentrated in alternating
layers. ... If these mica minerals grow during deformation, they will be aligned
with their ... Each of these minerals has the same chemical composition (Al2 SiO5
), but ...
The solid rock that makes up the Earth's crust is called bedrock. It can be seen on
... It is often found as bands within chalk. Chalk is soft, white, and ... limestone or
granite. Light and dark layers of minerals can be seen rippling across the rock.
Identify major minerals contained within a metamorphic rock. • Distinguish
between ... and the formation of bands or layers of like minerals. METAMORPHIC
A rock is an assemblage of mineral grains. ... Felsic igneous rocks are light in
color. ... Much limestone has apparently been altered over the ages into a related
carbonate ... If there are platy or elongate minerals in the resulting metamorphic
rock they will ... The light and dark bands are alternations of felsic vs. mafic layers
Slate is a hard, fine-grained rock with a well-developed rock cleavage or ... The
light and dark bands (gneissic banding) are alternations of felsic vs. mafic layers.