Sedimentary Rocks

Question 1

Conglomerate

Answer 1

Coarse-grained sedimentary rock composed of rounded fragments, (greater than 2 mm) within a matrix of finer grained material cemented together

Question 2

Basal Conglomerate

Answer 2

A conglomerate deposited on an erosion surface and constituting the bottom layer of a stratigraphic series.

Question 3

Sandstone

Answer 3

Clastic sedimentary rock composed mainly of sand-sized minerals
Most is composed of quartz and/ or Feldspar

Question 4

Shale

Answer 4

Fine-grained, clastic sedimentary rock composed of clay minerals and silt sized particles of other minerals.
Quartz and Calcite

Question 5

Greywacke

Answer 5

Variety of sandstone
Poorly sorted angular grains, Dark Color
Quartz and Feldspar set in a compact clay-fine matrix

Question 6

Arkose

Answer 6

Type of Sandstone
Contains at least 25% Feldspar sand, and Quartz
Pink in color

Question 7

Limestone

Answer 7

Composed largely of Calcite and Aragonite

Most composed of skeletal fragments of marine organisms such as coral

Question 8

Dolomite

Answer 8

Sedimentary rock composed of dolomite (Calcium magnesium carbonate)
Also called Dolostone

Question 9

Chert

Answer 9

Fine-grained silica rich
May contain small fossils
Feels smooth

Question 10

Clastic

Answer 10

Rocks composed of broken pieces of older rocks

Question 11

Sorting

Answer 11

Distribution or grain sizes

Question 12

Order of Sedimentary Rocks based on Grain Size: Large to Small

Answer 12

Conglomerate- Breccia- Graywacke- Sandstone- Siltstone- Mudstone- Shale