Episodic memory is a type of explicit memory, such as those of childhood experiences. These memories have very specific details on context, emotions etc.
Episodic memories are associated with hippocampus
Semantic memory is a type of explicit memory, which includes knowledge, facts, concepts and meaning. They start off as episodic memories, and are generally considered stronger. Semantic memories are associated with the temporal lobe
Procedural memory is a type of implicit memory, which includes memory of performed tasks or skills.
Procedural memories are associated with the cerebellum and motor cortex.
Brainscans support types of memory, as they have shown the specific areas associated with them.
Further support for the distinction of implicit and explicit memory comes from a separate case study of PM (Finke et al 2012). PM was a cellist who suffered from amnesia. Explicit memory affected, but procedural in tact.