Part1

Field/Lab Rock Assignment

Geology 1Mr. Lawler

By: Celin Juan

Igneous Rock 1

Igneous Rock 1 Continued

Igneous Rock is formed by the solidification of molten magma.

This Lava Rock is an igneous rock. It's location is unknown, but since it's lava rock, it's found mostly around inactive/active volcanic areas. This rock could be of Scoria in nature. The vesicles are of trapped gas.

The reason you call tell it's a Igneous rock is by the texture. The rock is uniformed without layers.

Sedimentary Rock 1

Sedimentary Rock 1 Continued

Marine Sedimentary rocks are formed from consolidated clay sediments.

This rock is a sedimentary rock. It's location is unknown. When I received this rock many years ago it was said it came from a town called Coalinga, CA. The town is situated about 100 miles east of the ocean. Upon further research the area of Coalinga use to be an ancient sea bed. So, the possibility it came from Coalinga, Ca, can be true.

Sedimentary Rock 1 Continued

The reason you can tell it's a sedimentary rock is by the texture of it. Mostly, all sedimentary rocks have layers or strata. Sedimentary rocks can sometimes collect various organisms bones or shells that undergo some recrystallization in ground water. This becomes a fossil.

Metamorphic Rock 1

Metamorphic Rock 1 continued

Metamorphic rocks are rocks that are altered by pressure and heat.

This metamorphic rock was found near the ocean.

The reason you can tell it's a metamorphic rock is by the texture, but that really doesn't help that much either. Metamorphic is very similar to igneous rock, so you have to look closely and examine all the detail of it.

Sedimentary Rock 2

Sedimentary Rock 2 Continued

Sedimentary rocks are formed from consolidated clay sediments.

This Sandstone Rock is a clastic sedimentary rock. It's location was found near the ocean.

The reason you call tell it's a sedimentary rock is by the texture. The rock is made up by sand size debris.

Metamorphic Rock 2

Metamorphic Rock 2 continued

Metamorphic rocks are rocks that are altered by pressure and heat.

This metamorphic rock was found in San Luis Obispo, Ca. This rock could be called Schist, because it has some developed foliation.

Metamorphic is very similar to igneous rock, so you have to look closely and examine all the detail. This rock has multiple layers. It may be called a Gneiss, which are found almost anywhere.