Two economically important metamorphic minerals are graphite and ...

[EY67]

Two economically important metamorphic minerals are graphite and corundum, which can be used, respectively, for ____.
 A)abrasives and furnace linings
 B)furnace linings and abrasives
 C)furnace linings and dry lubricants
 D)dry lubricants and abrasives
 E)dry lubricants and talcum powder

Question 2

Explain why increased seafloor spreading, resulting in higher heat flow and an increase and rapid expansion in oceanic ridges during the Cretaceous, result in worldwide transgression onto the continents.

[mmpiza]

Answer to Question 1

D

Answer to Question 2

Increased seafloor spreading and higher heat flow would result in a higher amount of new oceanic crust coming from spreading ridges. New, hot oceanic crust is less dense than cooled oceanic crust. This less-dense crust would displace more ocean water onto the continents.

[EY67]

Excellent

[phuda]

Gracias!