Granite - 325 Ma
Shale deep red color; mammal tracks; leaf
Basalt contains vesicles, does not contain
Sandstone - well-rounded, well-sorted, frosted
grains; large cross-beds, macroscopic fossils not
Gabbro - 235 Ma
Gabbro - 70 Ma
Sandstone well-rounded, well-sorted; broken
shells of marine organisms
Shale well-sorted, well-rounded; unbroken
Limestone bedded; moderately fossiliferous;
laterally continuous in all directions
Conglomerate - well-rounded
Basalt - contains pillows
Shale - contains fresh-water fish fossils
Sediment - very poorly sorted, angular clasts
Y and X are faults
What is the age (you should use a range) of the following units or features on the diagram? Give ages in Ma (millions of
Which type of stress (tension, compression or shear) caused the deformation of
Fault X ___________________
Fault Y ___________________
What type of unconformities (nonconformity, angular unconformity, disconformity) are found in the diagram?
There is a(n) Nonconformity between units B and C
There is a(n) Angular unconformity between units A and E
There is a(n) Angular unconformity between units H and M
There is a(n) ___________________________ between units _______ and ________
Is rock unit J more similar in depositional environment to the Mississippian Redwall Limestone in the Grand Canyon or
the Permian Reef Complex in the Guadalupe Mountains? Explain your reasoning.
Describe the formation of sediment N and the evidence for your interpretation.
If gabbro F and gabbro G were intruded at the same temperature and the same depth, which would have larger
crystals? Explain your reasoning.