The age of a mineral

February 12, 2019 admin 1

The age of a mineral can be determined by:– Measuring the ratio of parent isotopes to daughter isotopes.– Calculating the amount of time by using […]

Kola Superdeep Borehole

February 6, 2019 admin 0

The Kola Superdeep Borehole (Russian: Кольская сверхглубокая скважина) is the result of a scientific drilling project of the Soviet Union in the Pechengsky District, on […]

Water dowsing

February 5, 2019 admin 0

This is the practice of using a forked stick or other device to locate groundwater (and minerals). The dowser, or water witch, holds one fork […]

The Richter and Mercalli Scales

February 5, 2019 admin 0

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 […]

Lateral and Medial Moraines

January 24, 2019 admin 0

Alpine glaciers produce two types of moraines that occur exclusively in mountain valleys. The first of these is called a lateral moraine . As discussed […]

The evolving shore

January 16, 2019 admin 0

These diagrams illustrate changes that can take place through time along an initially irregular coastline that remains relatively stable.The diagrams also illustrate many of the […]

Deflation and Blowouts

January 16, 2019 admin 0

One way that wind erodes is by deflation (de = out, flat = blow), the lifting and removal of loose material. Deflation sometimes is difficult […]

Surface Waves

January 13, 2019 admin 3

There are two types of surface waves. One type causes Earth’s surface and anything resting on it to move, much as ocean swells toss a […]