Monthly Archives: April 2008

Limestone Topography

Posted on April 25, 2008 by Rashid Faridi

Limestone caves Caves form in limestone (calcium carbonate), and occasionally in dolomite (calcium magnesium carbonate), when water containing dissolved carbon dioxide (carbonic acid) seeps into rock crevices and joints. The carbon dioxide comes from decaying organic matter in soil, and … Continue reading →

Posted in interior of the Earth | 3 Comments

Limestone Caves

Posted on April 25, 2008 by Rashid Faridi

Limestone has a peculiar quality in that whilst pure water cannot dissolve it rain water can because it has picked up carbon dioxide from the air and soil and turns the limestone into calcium bicarbonate. That process of dissolving becomes … Continue reading →

Posted in interior of the Earth, Landforms | 3 Comments

Dust Bowl

Posted on April 25, 2008 by Rashid Faridi

During the 1930s, a prolonged dry spell culminated in dust storms and soil destruction of disastrous proportions. The “black blizzards” of the resulting Dust Bowl inflicted great hardships on the people and the land. The Dust Bowl has been called … Continue reading →

Posted in Environment | Leave a comment

Wind Erosion

Posted on April 24, 2008 by Rashid Faridi

Wind erosion is a serious problem in many parts of the world. It is worse in arid and semiarid regions. Areas most susceptible to wind erosion on agricultural land include much of North Africa and the Near East; parts of … Continue reading →

Posted in Environment | 1 Comment