Slate overlaying quartzite represents:highgrade metamorphism metasomatism,low grade <span title="metamorphism,disconformity">metamorphism,disconformit...</span>

Question

Slate overlaying quartzite represents:highgrade metamorphism metasomatism,low grade metamorphism,disconformit...

Answer 1

Cross off metasomatism, since that&#039;s alteration by chemicals - and neither slate nor quartzite are examples of that.

http://en.wikipedia.org/wiki/Metasomatis...

Slate is a low grade metamorphism, whereas quartzite is medium/high grade.  

http://geology.csupomona.edu/alert/metam...

Since slate and quartzite are not the same grade metamorphism (ie not low/low or high/high), I&#039;m going to have to go with disconformity.