Salt Glaciers

September 9, 2019 admin 1

Where salt flows out of a diapir (salt plug) above sea level it flows gravitationally in the direction of highest dip. In dry regions, such […]

Columnar Jointing

Columnar Jointing

September 9, 2019 admin 0

In many respects, sills closely resemble buried lava flows. Both are tabular and can extend over a wide area, and both may exhibit columnar jointing. […]

Strike and Dip

Strike and Dip

September 6, 2019 admin 5

Sedimentary rock units, because they are usually deposited in horizontal layers, are most useful when studying rock deformation. If the sedimentary rock layers are horizontal, […]

Anticlines and Synclines

Anticlines and Synclines

September 2, 2019 admin 0

The two most common types of folds are anticlines and synclines (Figure 1). Anticlines occur when compressional stresses squeeze sedimentary layers into arch-like folds. These […]

Hydraulic Fracturing

August 29, 2019 admin 0

In some shale deposits, there are significant reserves of natural gas that cannot naturally leave because of the rock’s low permeability. The practice of hydraulic […]

Slope support

Slope support

August 29, 2019 admin 0

Slope support Retaining walls: common practice and successful on small slopes and cut faces, but not on larger slopes. Large unstable slopes are not easily […]

The Richter and Mercalli Scales

August 21, 2019 admin 1

Seismic waves are characterized by their wavelength and amplitude. Shorter-wavelength and higher-amplitude waves are the most destructive (Figure 1). Earthquakes happen all the time everywhere […]

Piezometer

August 21, 2019 admin 3

A piezometer is either a device used to measure liquid pressure in a system by measuring the height to which a column of the liquid […]