Base your answers to questions 1 and 2 on the rock columns below and on your knowledge of Earth
science. The rock columns represent four widely separated locations, W, X, Y, and Z. Number 1, 2, 3,
and 4 represent fossils. The rock layers have not been overturned.
Location W
Location X
Location Y
Brown
siltstone
Tan
limestone
Black
shale
Location z
Food Gray
Gray
conglomerate
Booa
Tan
limestone
Red
sandstone
Brown
siltstone
Gray
limestone
Black
shale
Red
sandstone
Tan
sandstone
Brown
siltstone
Gray
limestone
Black
shale
Gray
siltstone
Red
sandstone
Tan
sandstone
Gray
limestone
Green
shale
Black
shale
1. Which rock layer is the oldest?
A) tan sandstone B) gray limestone C) green shale
D) black shale
Answers: 3
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