Memories about which people are not consciously aware are called:

This type of memory is called Implicit memory and it is called like that because this is a type of memory that belongs to people that are not conscious and aware but can affect subsequent performance and behavior of the person. Implicit memory is also called nondelarative memory and it is in contrast to explicit memory. 

Implicit Memory is the correct answer.

Explanation:

"The violence and anger dismayed by protestors..."