The image below shows an outcrop of coarse-grained sedimentary rock.Note the rock hammer for scale.What is the name of this rock type? 
Definitions:
Involuntary Paralysis
The inability to move muscles or control movement, often without conscious will, due to neurological or muscular disorders.
Actin-Myosin Cross-Bridges
The molecular interactions between actin and myosin filaments in muscle cells that lead to muscle contraction.
Sarcoplasmic Reticulum
A type of endoplasmic reticulum found in muscle cells, where it stores and releases calcium ions to trigger muscle contraction.
Acetylcholine
A neurotransmitter involved in many functions including muscle contraction, heart rate regulation, and the modulation of neuroplasticity in the brain.
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