The contact between the gneiss and the overlying fractured sandstone represents: Intrusive contacts.
What is Intrusive contacts?
Intrusive contacts can be defined as the way in which one rock invade or intrude another rock.
Example when gneiss intrude into sandstone or touches sandstone this means that intrusive contract has occur or taken place.
Therefore the contact between the gneiss and the overlying fractured sandstone represents:
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