Stress, Strain & Mohr Circles in Geology

Question 1

is the deformation of sediments and bedrock (generally sedimentary rocks) at the
toe of an advancing ice sheet. In this case it is the pushing of the ice that creates the deformation

Answer 1

Glaciotectonics

Question 2

deals with the deformation caused by the (mostly) vertical movement of salt through its overburden

Answer 2

Salt tectonics

Question 3

is concerned with recent and ongoing crustal motions and the contemporaneous stress field

Answer 3

Neotectonics

Question 4

change in length, shape or size of rocks and structure

Answer 4

strain

Question 5

Where the deformation applied to a rock volume is identical throughout that volume, the deformation is……

Answer 5

homogeneous

Question 6

a state of strain where stretching in X is compensated for by equal shortening in the plane orthogonal to x

Answer 6

Uniform extension

Question 7

force type that affects the entire volume of a rock, the outside as well as the inside, and is
known as…

Answer 7

body force

Question 8

force acts on surfaces only and is referred to…

Answer 8

surface force

Question 9

Engineers and rock mechanics-oriented geologists may refer to stress on a surface as

Answer 9

traction