1. Types Of Rocks
ROCKS

2. Metamorphism Rock
Gneissic
 Gneissic rock come from the Metamorphism
rock.
 Metamorphism rock change the form.
 The changes are in the mineralogy, texture, and
sometimes the chimical composition of rocks
 Metamorphism rocks takes place usually in
elevates temperatures and pressures.
 This rocks gradually changes until state of
equilibrium with the new enviroment.
 The Agents of metamorphims include heat,
pressure, and chemically active fluids.

3. Gneissic
 Gneissic rock is common and widely
distributed type of rock.
 The rocks with a banded appearence are call
gneissic.
 Foliated gneissic will not usually split as easily
as slates and some schists.
 This gneissic rock I found in Turlock.
 The place was in my way to Turlock near to
highway

4. Gneissic
 I identify the rock for the texture because are
a little dark biotite flakes and the light silicate
minerals.
 Given the rock a banded or layered
appearance.
 Gneissic is a foliated texture

5. Quartz
 The Changes on Metamorphism rocks
increased the density, change in size,
reorientation of mineral grains
 The transformation of low temperature
minerals into high temperature minerals.
 Metamorphism rocks can be broadly
classified in foliation exhibited and to lesser
extend on the chemical composition.
 Quartz is a very hard metamorphism rock.

6. Quartz
 The quartz is a non foliated texture
 Fused quarts grains, massive, very hard
 We can find this type of rock in the water or near
to it.
 The quarts are formed in sandstone.
 Quartz formed under moderate to high grade
and the grains in sandstone fuse together.
 The quartz ridges are often bare or covered only
with very thin layer of soil and a little vegetation.

7. I identify this rock because is near to the water in yosemite and this rock shows grains
typical of a quarts and this rocks are white to gray.

8. Sedimentary Rocks
 About 75 percent of the land areas are
covered by sediments and sedimentary rocks.
 Across the ocean floor the earth solid surface,
virtually everything is covered by sediment.
 This rocks are mostly located in mid ocean,
water and at some volcanic areas.
 The particles of the sedimentary rocks by
accumulating is call sediment.

9. Sedimentary Rocks
 The sediment are formed by weathering and
erosion in a source area and then they are
transported to the place of deposition by
water, winds mass movement or glaciers
 This group of rock provides geologists with
much of the basic information they need to
reconstruct the details of Earth history.

10. Sandstone
 The name of this rock in which the sand size
grain dominate
 Sandstone is the most abundant sedimentary
rock, accounting for approximately 20 percent of
the entire group.
 Sandstone form in a variety of environment and
often contain significant clues about their origin.
 The shapes of the sand can also help decipher
the history of sandstone.
 The sandstone also containing significant
amount of feldspar and angular grain of the
ferromagnesian minerals.

11. This sandstone is a sedimentary rock and I found it in Turlock Lake in the cold water

12. Igneous
 The igneous rocks are composed or interlocking
crystals.
 Igneous form in two basics setting Magma and
Crystallizes.
 When magna loses its mobility before reaching
the surface it eventually crystallizes form in a
igneous rocks.
 They also known as plutonic rocks.
 Igneous rock are abundant in western portions of
the american like vocanic peak cascades and
mountains .

13. Granite Rock
 This rocks dominated in minerals.
 The geologist also refers to granite rock as
being felsic.
 Granitic rocks are rich in silica about 70
percent.

14. The granite is an igneous rock I found this in Yosemite mountains I identify this rock for
the texture.

15. Mafic Basaltic Rock
 Basalt is a very dark green to black.
 This rock is composed primarily of pyroxene
and calcium.
 Basalt is the most common extrusive igneous
rock.
 Many volcanic island and iceland are
composed mainly of Basalt rocks/
 I find that this rocks is a Basaltic for the color
and texture and for the upper layers.