Category Archives: Geology

Entropy and the Grand Canyon

It has been our good fortune to row 280 miles of the Colorado River through the Grand Canyon twice in the last seven months. This is rare for private boaters limited to one trip per calendar year and subject to … Continue reading

Posted in Geology, Paleoclimate, Paleogeography | 1 Comment

Differential Motions of the Continents, Mesozoic and Cenozoic Eras IV: Constraints

We know the position and velocity of stable points on our six cratons. A reasonable question to ask is, “Can we account for this motion?” Above is a map of the ocean floor created in the last 10 million years. … Continue reading

Posted in Geology, Paleogeography | 2 Comments

Shiprock

This picture was taken in September 1979. There is a print of it in my office, faded a bit. When I wax geological, the sheer improbability of this mineralogically unusual salient weighs heavily. High in Magnesium, Potassium and Sodium; low … Continue reading

Posted in Geological Evolution of the Western United States, Geology | Tagged | Leave a comment

Oil and the Devil

  The concept of the devil in the Judeo-Christian/Muslim tradition seems to have its roots in an older Persian and possibly Indo-European notion of opposing forces of good and evil. The Christian conception developed into the elaborate scheme described by  Dante which was integrated into … Continue reading

Posted in Anthropology, Climate, Geology, History, Religion | Tagged | Leave a comment

The State of the Onion

Let’s say the way this planet works is an onion. There are many layers and they interact in ways far more complex than onion rings. Yet we have to start somewhere, and peeling back the layers of this onion can … Continue reading

Posted in Climate, Geology, LLSVP's are Doughboys, Magnetic Reversals, Moho, Oceanography, Seismic Tomography | Tagged | Leave a comment

The end of the Hollowscene

The concept of the Holocene epoch is a 19th century notion developed when the preceding “ice age” was thought of as a monolithic block of ice extending back to the end of the Pliocene. In this context it made sense … Continue reading

Posted in Anthropic interglacial, Anthropocene, Climate, Geology, Holocene, Paleoclimate | Tagged , , | Leave a comment

Aftershocks Implicate Unusual Fault System in American Canyon Quake

California can be thought of as a ice flow where multiple independent blocks with different inherent buoyancies are at times pressed together, pulled apart, and slid past each other. The M 6.1 American Canyon quake did not take place on … Continue reading

Posted in American Canyon Earthquake, Geography, Geology, Plate Tectonics | Tagged , | Leave a comment