A clastic sedimentary rock composed of pebbles (40%), cobbles (25%), boulders (10%) and sand (25%; even amounts of quartz and feldspar) would be called a(n)

A) sandy pebblestone.
B) conglomeratic pebblestone.
C) arkose.
D) sandy conglomerate.


Answer: D

Environmental & Atmospheric Sciences

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Answer the following statement(s) true (T) or false (F)

1. A major factor in the decline of the Native American populations after the arrival of Europeans was disease. 2. The economy of the Middle Colonies was characterized by plantation agriculture. 3. The rate of population increase in the United States is similar to that of other materially wealthy countries. 4. Immigrants often have higher birth rates and younger age structures than long-established populations. 5. The primary factor in whether or not immigrants—legal and illegal—come to the United States is legislation.

Environmental & Atmospheric Sciences

Which of the following best describe the E soil horizon?

A) leaching zone B) erosion zone C) residual zone D) regolith zone

Environmental & Atmospheric Sciences

The criteria by which the region 'Africa South of the Sahara' is defined does not include which of the following factors?

A. The religious backgrounds of its people. B. whether or not a country is landlocked. C. The transitional northern boundary known as the Sahel. D. The physical borders along both the Atlantic and Indian Oceans.

Environmental & Atmospheric Sciences

There is no true monsoon climate anywhere in North America

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences