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
Ground cover and colour such as shown here in (a) white sand
White variant of Fallow Deer, in Beijing Zoo
Eastern gray squirrels are born naked with their eyes closed
Margination, diapedesis, and chemotaxis of white blood cells
Pigmented bands in nail of patient with dark skin
Types of white blood cells.