Transcript Sedimentary Rock Part 1 - St. Francis Cathedral School

Sedimentary Rock Part 1
By Matt Hopkins, David Irizarry, Larry
Morrison, and Ben Beczynski
#1: What is a sedimentary rock?
What are the types?
• A sedimentary rock is a rock that is formed by
deposition of other small stones. The rocks
eventually fuse together.
• Examples of this are coal, iron ore, flint, and
sandstone.
#2: How do they differ from other
rocks?
• Sedimentary rocks are formed on the Earth’s
layer. When weather and erosion wear down
rocks. Bits and pieces of the rock fall off and
become loose particles. Over time,
weathering and erosion compact all the loose
particles and rocks together to become one
rock.
#3: How can different sedimentary
rocks differ in appearance?
• Sedimentary rock can differ in ways such as
fine grained, coarse layered, textured, grey,
pink, white, powdery, and sandy textured.
• From the outside layer of the rock, you can tell
it consists of loose particles and rocks, which
are packed together by weathering and
erosion.
Random Questions
DO NOT CALL OUT
• How is marble a sedimentary rock?
Trick question – it’s not :P
• Is obsidian sedimentary or metamorphic?
Neither – it’s igneous