Category Archives: Plate Tectonics

The geological story told by Iceland

Iceland is a volcanic island in the North Atlantic Ocean, slightly below the Arctic Circle. The island is situated on a mid-ocean ridge at the boundary between the North American plate and the Eurasian plate. In Iceland, we find evidence of horizontal movements, in which two plates spread apart as the crust dilates with intrusion of new magma. Iceland, however, is also associated with a mantle plume (a narrow stem of upwelling of magma from deep in the mantle) that has maintained volcanism high and vigorous. Continue reading

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Alpine ophiolites: Remnants of a lost ocean

In 1813, French geologist Alexandre Brongniart published a paper on the mineralogical classification of rocks[1] where he introduced the new name “ophiolite” for a suite of dark rocks rich in the mineral serpentine. The name was coined from the Greek … Continue reading

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The Paleozoic Rock Record: A Broad Overview of Features and Trends

The rocks of the Earth are like pages of a history book containing information about the past. Geologists who enjoy reading this “book” have found that it consists of two “volumes:” the first, named Precambrian, is mostly devoid of macroscopic … Continue reading

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THE PRECAMBRIAN: Part 3 of 3

Because the Precambrian part of geologic history covers so much material, the discussion is split into three parts with this being the third. Here is a summary of the three sections: The first section summarizes the standard model for formation … Continue reading

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THE PRECAMBRIAN: Part 2 of 3

This gallery contains 68 photos.

Because the Precambrian part of geologic history covers so much material, the discussion is split into three parts with this being the second. Here is a summary of the three sections:

The first section summarizes the standard model for formation of the Universe, Solar System and Earth, Moon, oceans, continents, and plate tectonics.
This second section describes Precambrian rock exposures, as well as the atmosphere, climate, and Precambrian life. Many illustrative pictures are included. Design examples and creationist ideas are interspersed throughout.
The third section provides two perspectives suggested by creationists: (1) a young universe and life and (2) old inorganic material, but young life. Continue reading

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Scientific Revolutions: Part 2

Further conceptual revolutions in science Revolutions in the Life Sciences The life sciences have experienced fewer revolutions than the physical sciences. The first major revolution in the biological sciences was initiated by William Harvey, as noted above. The next revolution … Continue reading

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How do plate tectonics relate to the Bible?

If someone asks you any question about geology and your answer includes the phrase “plate tectonics,” you have a fairly good chance of being correct or at least on track to the right answer. Plate tectonic theory provides an explanation … Continue reading

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