Geologists Have Principally Used Which Class of Rocks for Radiometric

question 72

Multiple Choice

Geologists have principally used which class of rocks for radiometric dating?

• A) Sedimentary
• B) Igneous
• C) Foliated
• D) Metamorphic

---

Definitions:

Facial Nerve

The seventh cranial nerve that controls the muscles of facial expression, taste sensations from the anterior two-thirds of the tongue, and the secretion of saliva and tears.

Vagus

Referring to the tenth cranial nerve (vagus nerve), which is part of the parasympathetic nervous system and controls functions of the heart, lungs, and digestive tract.

Ptosis

Falling down of an organ—for example, the drooping of the upper eyelid.

Oculomotor Nerve

The cranial nerve III, responsible for controlling a majority of eye movements, pupil constriction, and keeping the eyelid open.