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
Synaptic response of photoreceptors to dark and light.
White tiger in water at the Singapore Zoo
Two devils, one without any white markings. Around 16% of wild devils have no markings.
A Splash of Color in a Frozen World of White
he White-throated Bee-eater, Merops albicollis is a near passerine bird in the bee-eater family Mero
Medial view of tracts revealed by removing gray matter from a midsagittal section