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Category Archives: Cretaceous normal superchron
The Cretaceous Superchron, Beaufort Isochrons, and the Motion of North America
In the last post we explored a very peculiar set of seafloor isochrons in the Beaufort Sea and Arctic ocean. We found that a perpendicular shift in seafloor spreading defined the Cretaceous Normal Superchron, the longest known period in earth … Continue reading
Idosyncratic Isochrons, and the Cretaceous Normal Superchron
The magnetic lineations in the ocean floor were first discovered using magnetometers designed for submarine detection. These isochrons are tenets of our notion of plate tectonics, yet many isochron patterns are inexplicable by our current tectonic model. We have previously … Continue reading
Posted in Cretaceous normal superchron, Geography
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Large Igneous Provinces, Temperature, Sea Level, and Extinctions
We had been looking at the stuff one can easily google regarding global temperature and large igneous provinces (LIP’s) and it seemed there might be something, so we dug in. There is an organization, largeigneousprovinces.org, that has excel data in … Continue reading
Around the World in Eighty Million Years
We have been doing a puzzle like you might have been given in first grade where there is some large animal with lines missing and your job is to connect the dots and fill it in. The joy is still … Continue reading
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