Question

question 25 2 pts which of the following rocks likely developed under conditions of high confining lithostatic pressure? gneiss schist phyllite marble question 26 2 pts true or false: the trend of volcanic island chains indicates the direction of movement of hotspots over time. true false

Explanation:

• For Question 25: Gneiss is a high - grade metamorphic rock that forms under high pressure and temperature conditions including high confining lithostatic pressure. Schist, phyllite are lower - grade metamorphic rocks compared to gneiss in terms of pressure conditions for formation. Marble is mainly formed from limestone under heat and pressure but not typically associated with extremely high confining lithostatic pressure as gneiss.
• For Question 26: The trend of volcanic island chains is due to the movement of tectonic plates over stationary hotspots, not the movement of hotspots over time.

Answer:

Question 25: Gneiss
Question 26: False