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1
Long sheets of
metamorphic
rock
that have been sheared in two.
2
In many cases, however, the early history of a
metamorphic
rock
can be deciphered.
3
There are 3 specific kinds of
metamorphic
rock
in N.Y.C.
4
They are of quartzite, lava, greenstone,
metamorphic
rock
and basalt.
5
There is no igneous, no
metamorphic
rock
here; nothing but limestone of the Jurassic formation.
6
Stone hatchets rather well formed with blunt poll, distinct annular groove, and tapering blade; chiefly of basalt, three of
metamorphic
rock
.
7
Stone and the other two hacked their way up a mountainside of hard,
metamorphic
rock
until they found a strip of limestone.
8
The three-billion-year-old, razor-sharp Lewisian gneiss on the isles of Lewis and Pabbay is some of the oldest
metamorphic
rock
on the planet.
9
It measures some 8' 6" x 4' 6" x 4' 0" and reposes upon two slightly jutting points of the underlying
metamorphic
rock
.
10
These few examples must suffice of the great class of
metamorphic
rocks
.
11
So again the making out of cleavage and the foliation of the
metamorphic
rocks
.
12
There is also a class of rocks, called
metamorphic
rocks
,
including some kinds of marble.
13
Why do
metamorphic
rocks
appear on the surface to-day?
14
Anthracite coal occurs in folded and
metamorphic
rocks
.
15
How do the Triassic sandstones and shales compare in hardness with the igneous and
metamorphic
rocks
about them?
16
The and sands and limy oozes now changed to gneisses, schists, marbles, quartzites, slates, and other
metamorphic
rocks
.
metamorphic
rock
metamorphic