'Earth Revealed: Sedimentary Rocks' Geology Worksheet (Page 3 of 4) in pdf

'Earth Revealed: Sedimentary Rocks' Geology Worksheet Page 3

ES202 Video Exercise – Part 2 of the Earth Revealed “Sedimentary Rocks” Video

Focus on Stratigraphy and Sedimentary Structures

(Start Video at Time Mark 10:30)

1. Describe the “principle of uniformity” or “law or uniformitarianism”? How is it applied to sedimentary rocks

and interpreting Earth history?

2. True or False: Earth surface systems today have existed in the past, their processes producing sedimentary

rock products.

3. Define the term “sedimentary structure”; how does this term differ from the concept of a “sedimentary rock”?

4. Define bedding? What is a bedding plane? Draw and label a sketch of several sedimentary beds to illustrate

your answer.

5. True or False: A stack of sedimentary beds represent a continuous recording of geologic time and events in

geologic history.

6. Describe the law of original horizontality, as applied to sedimentary beds. Draw a sketch to illustrate your

answer.

7. Draw a sketch of “cross-bedding”. List some example environments in which cross-bedded sand will

develop.

8. True or False: The angle and direction of tilt in cross beds can give clues as to which way fluids (liquid air or

water) were flowing in the geologic past?

9. Draw a sketch to support your answer in the previous question. Show cross-bedding and the direction of

transport that formed the structure.

10. Define the term “ripple marks”. Draw a sketch of asymmetric ripple marks, show the direction of wave

motion.

'Earth Revealed: Sedimentary Rocks' Geology Worksheet Page 3