The white granite of the Idaho Batholith near Boise, Idaho, contains dark gray xenoliths of metamorphic material. Which is older? How do you know?
A) Granite; the principle of superposition
B) Xenoliths; the principle of cross-cutting relations
C) Granite; the principle of unconformities
D) Xenoliths; the principle of inclusions
Question 2
The Mississippi River cuts through Silurian-aged dolomite between northwestern Illinois and eastern Iowa. Which is older? How do you know?
A) Dolomite;the principle of superposition
B) Mississippi; the principle of original horizontality
C) Dolomite; the principle of cross-cutting relationships
D) Mississippi; the principle of lateral continuity
Red-eyed and white-eyed Drosophila
Female scorpion Compsobuthus werneri carrying its young (white)
This slave burial service, painted by John Antrobus in 1860, reflects an inversion of power relation
Black and White Out-Migration from Virginia and North and South Carolina, 1870–1940 (in thousands)
Gray Hair Mouse