Shale
Shale is by far the most abundant sedimentary rock. Although strictly speaking shale is a rock, it is relatively weak and soft, and engineers consider it to be a soil. … Read More
Search Results for: folding
A Theoretical Example – core boxes
Figure 1 is a drawing of three core boxes to illustrate some of the points made above.The drawing Fig. 1 is two dimensional and limited in what it shows by … Read More
Geologic modelling
Geomodelling (Geologic modelling) Geologic modelling, geological modelling or geomodelling is the applied science of creating computerized representations of portions of the Earth’s crust based on geophysical and geological observations made … Read More
Mapping at a Large Scale
Engineering geological mapping Large-scale maps are those devoted to the depiction of relatively small surface areas in great detail and range from about 1:1 000 (for the geology of a … Read More
Remedial Works for Rock Falls
Rock Falls Natural or constructed rock slopes which are, on the scale of the total slope, inherently stable may, through a process of natural decay or as a consequence of … Read More
Traps for Oil and Gas
Sometimes the upward migration of oil and natural gas is halted. A geologic environment that allows for economically significant amounts of oil and gas to accumulate underground is termed an … Read More
Salt Glaciers
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 as Iran, the flow occurs … Read More
Anticlines and Synclines
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 upfolded structures are sometimes spectacularly … Read More
What Causes Rock to Deform?
Every body of rock, no matter how strong, has a point at which it will deform by bending or breaking. Deformation (de = out, forma = form) is a general … Read More
What Is Metamorphism?
Unlike some igneous and sedimentary processes that occur in surface or near-surface environments, metamorphism most often occurs deep within Earth, beyond our direct observation. Notwithstanding this significant obstacle, geologists have … Read More