Starts September 22,
ends December 20 this year of 2016!
The slopes of most cinder cones are usually about 30 degrees because that is the angle of repose, which is the slope at which the loose cinder can stand in equilibrium.
The cinder cones vary significantly in height, from just a few meters of height to few hundred meters.
They are numerous around any volcano, and lava can come out of them or may flow below them.
Among the given options that is given above ''All life was marine (i.e., found in the ocean)'' is true about life in the Precambrian.
Answer: Option D
<u>Explanation:</u>
During the Precamnrian time which includes Earth's history from birth up to 590 million years ago. Precambrian time is further sub divided into Hadean time, Archean time and Paleoproterozoic time, neoproterozoic time.
The sea was mother of all lives and still remains still today. The land based animals also carry a miniature ocean which is present in their cells and circulatory system. All lives including humans could be considered bags of sea water.
Answer:
Three
Explanation:
Three
Three extremely large explosive eruptions have occurred at Yellowstone in the past 2.1 million years with a recurrence interval of about 600,000 to 800,000 years. More frequent eruptions of basalt and rhyolite lava flows have occurred before and after the large caldera-forming events.
It is the Mariana trench , also perhaps an opening for volcanic activities
