In this diagram,the contact between the granite (unit 1) and the lowest layer (unit 2) is depositional and the dike (unit 6) cuts across both units.What is the oldest unit? 
Definitions:
Dissociative Identity Disorder
Dissociative identity disorder is a psychological condition characterized by the presence of two or more distinct personality states or identities within a single individual.
Neurodevelopmental Disorder
A disorder that affects the development of the nervous system, leading to impaired brain function and behavior.
Obsessive-Compulsive Disorder
A mental disorder where people feel the need to check things repeatedly, perform certain routines repeatedly, or have certain thoughts repeatedly.
Impulsively
Acting without forethought or consideration of the consequences.
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