Sedimentary Rocks Identification Chart PDF

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Summary

Identification chart and characteristics of each sedimentary rocks contained in the lab kit....

Description

Sedimentary Rocks Identification Activity Worksheet Instructions Use the Sedimentary Rock Classification Chart and the Module 6 information to identify your Sedimentary Rocks samples. Record your information in the table below. Then answer the questions, take a picture of your identified specimens, and upload your worksheet and picture to the Module 6 – Sedimentary Rocks Identification dropbox.

Rock Name Quartz Sandstone

Type

Texture

Minerals

Detrital

Clastic

Quartz

Micrite

Chemical Precipitate

Crystalline

Calcite

Fossiliferous Limestone

Chemical Precipitate

Clastic

Calcite

Chert

Chemical Precipitate

Crystalline

Fine-grained silica

Shale

Detrital

Clastic

Arkose

Detritol

Clastic

Quartz and clay minerals Quartz sand, 25% feldspar minerals

Conglomerate

Detrital

Clastic

Rock Fragments

Chemical Precipitate

Crystalline

Gypsum

Calstic

Iron oxixe, Manganese oxide, other minerals combined with silica

Gypsum Petrified Wood

Detrial

1. Consider two of your samples – quartz sandstone and arkose. How are these two rocks similar? How are they different? What are the controlling factors that determine the difference between these two rocks? They are both detrital sedimentary rocks and both have a clastic texture. Although both contain quartz minerals, arkose contains feldspar minerals as well. In the arkose rock, you can clearly see the grainy rocks.minerals that make up the rock. In Quartz sandstone you would need a magnifier to be able to see the individual minerals more clearly. 2. Consider two of your samples – fossiliferous limestone and micrite. How are these two rocks similar? How are they different? What are the controlling factors that determine the difference between these two rocks? They are both chemicsl precipitate/organic sedimentary rocks and contain calcite minerals. Although micrite has a crystalline texture, and fossiliferous limestone has a clastic texture.

Sedimentary Rocks Identification Activity Worksheet 3. You have a piece of petrified wood in your sedimentary rocks bag. Is petrified wood a rock? Do you believe petrified wood is a sedimentary rock? If so, what type of sedimentary rock (detrital or chemical precipitate) is it? If you do not believe petrified wood is a sedimentary rock, in which category of rock (igneous, sedimentary, or metamorphic) should it be classified?

I think petrified wood could be classified as a sedimentary rock. Specifically a detrital rock because it contains sediment within the wood which hardens it. It also has a clastic texture because it is composed of pieces of minerals and sediments. After you have completed the activity, upload your completed Sedimentary Rocks Identification Activity Worksheet and the photo of your specimens to the Module 6 – Sedimentary Rocks Identification dropbox. Please use Microsoft Word for your document; if you are using other software, please convert it to a pdf so it can be read in D2L....