Sedimentary Rock Identification (Page 3 of 3) in pdf

Sedimentary Rock Identification Page 3

Sample F: This sedimentary rock has a crystalline texture and is composed of grains of halite of varied size.

It forms as crystals of chemical precipitates and evaporites. Name this sedimentary rock.

Answer: ______________________________

Part 2:

Using the reference tables, classify the sedimentary rock samples in your box into two groups according to

the following information:

Group 1- Clastic and Bioclastic: These rocks are composed of fragments ranging in size from very large to

very small. The fragments are cemented together with minerals. These rocks may feel very coarse or maybe

like sandpaper. Clastic rocks composed of the smallest sediments often contain fossils and are somewhat

crumbly.

Group 2 – Crystalline: These rocks show a uniform appearance (they look the same throughout) and have

smooth textures. In the reference tables, there are two samples that fit this description and are also classified

as minerals.

Place a check mark in the correct box on the chart for each of the rock samples.

Name

Clastic/Bioclastic

Crystalline

Breccia

Coal

Conglomerate

Limestone

Rock Gypsum

Rock Salt

Sandstone

Shale

Sedimentary Rock Identification Page 3