Parallel rock fractures that occur along numerous flat surfaces are called ______.

Parallel rock fractures that occur along numerous flat surfaces are called ______.

• A. Cracks
• B. Joints
• C. Veins
• D. Faults

Answer: (B)

Fractures that form when rock cracks but does not significantly move along the crack are called joints. These are natural breaks that split rock into flat, planar surfaces and often occur in many places, forming sets or patterns that reflect the stress the rock experienced. The defining feature is little to no offset between the two sides, so the fractures look like clean, even splits rather than offsets. Cracks is a more general term and can describe various openings, not necessarily with the lack of movement or the regular planar pattern joints show. Veins are mineral-filled fractures where fluids deposited minerals, so you’d see mineral matter in the crack rather than just a plain gap. Faults involve noticeable displacement between the sides, so they’re cracks with movement, not the parallel, movement-free splits described here.

Fractures that form when rock cracks but does not significantly move along the crack are called joints. These are natural breaks that split rock into flat, planar surfaces and often occur in many places, forming sets or patterns that reflect the stress the rock experienced. The defining feature is little to no offset between the two sides, so the fractures look like clean, even splits rather than offsets.

Cracks is a more general term and can describe various openings, not necessarily with the lack of movement or the regular planar pattern joints show. Veins are mineral-filled fractures where fluids deposited minerals, so you’d see mineral matter in the crack rather than just a plain gap. Faults involve noticeable displacement between the sides, so they’re cracks with movement, not the parallel, movement-free splits described here.