“Core angle” most commonly refers to alpha and beta angles used in geology and mining to measure the orientation of planar structures (like mineral veins or rock bedding) within a cylinder of drilled rock.
Because “core angle” can mean different things depending on the field, I have assumed you are asking about its primary technical use in drilling and geological exploration. 1. Alpha and Beta Angles in Drilling
When geologists drill into the earth, they pull up cylinders of rock called “cores.” To understand how rock layers are tilted deep underground, they use two specific internal core angles:
Alpha (α) Angle: The acute angle between the core axis (the center line of the cylinder) and the plane of the structure (like a fracture or layer).
Beta (β) Angle: The angle measured clockwise around the circumference of the core from a reference line (usually the “bottom-of-hole” line) to the highest or lowest point of the structure’s intersection with the core surface. 2. Other Common Interpretations YouTube·Margaret Martin, Physical Therapist Body Angle and Core Strength
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