Tag Archives: Cambrian

Follow the Granite

Granite is the currency in the construction of continents. Here we will time step through the existing surface expression of granites and related igneous and metamorphic rock in the Western US from the Archean to the present. Sediments are boring. … Continue reading

Posted in Geography, Geological Evolution of the Western United States, Geology, History of Life, Paleogeography | Tagged , , , | 3 Comments

The Hawaiian/Emperor Seamounts and How Island Arcs are Formed

Ever wonder why offshore island arcs should form at random spots in the oceans? No? Don’t worry, its a far fig newton. We offer here the suggestion that the locations are not random, that island arc trenches and probably spreading ridges and … Continue reading

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Posted in Geography, Geology, Gravity Anomalies, Seamount Chains as Incipient Island Arcs | Tagged , , , | 1 Comment