This is the second page of a three part brief review of the history of the Earth. It covers the time from the end of the Devonian Period to the close of the Mesozoic Era. The site describes this time interval in terms...
This brief review of Earth history starts with the Archeozoic Period and goes through the Devonian Period. It explains time divisions and that the basic unit of geologic time is the period, which comprises two or more...
This text discusses differences in ocean tides. Along America\'s Atlantic Coast, two high and low tides occur daily. Such tides are called semidiurnal. On the north shore of the Gulf of Mexico, the tide is diurnal,...
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