Category Archives: Geoid

The Pacific Triangle, The Pacific doughboy, and the wave

Folks just don’t seem to have their arms around the disarray in the earth sciences these days. Climate science and plate theory are going to have to be rebuilt from the ground up, or more appropriately from the core-mantle boundary. … Continue reading

Posted in Geography, Geoid, Geology, Large Igneous Provinces, LLSVP, LLSVP's are Doughboys, Oceanography, Pacific Triangle, Paleogeography, Plate Tectonics, Seafloor Isochrons, Seismic Tomography | Tagged , | Leave a comment

The Pacific Doughboy and the Core

Here at the Trunkmonkey Research Institute we’ve been possessed of late by the Doughboys. This representation is not really very good. It is a plate carree projection extruded as a box. Trouble is, when you bend it round like our … Continue reading

Posted in Climate, Geoid, Geology, LLSVP, LLSVP's are Doughboys, Seismic Tomography | Tagged , | Leave a comment

Doughboys

I have seen the following attributed to Ritsema and van Heist but have not found it in any of their papers. People with no sense of verbal aesthetics have named the red things LLSVP’s for Large Low Shear Velocity Provinces. Sometimes they … Continue reading

Posted in Africa Keystone of Pangea, Asthenia, Geoid, Geology, Large Igneous Provinces, LLSVP, LLSVP's are Doughboys, Moho, Seismic Tomography | Tagged , , | Leave a comment

Gravity Signals of Extensional Sialic Crustal Regimes

I have always loved the poorly named Great Basin of the Western United States. Yes, its maze of lowlands held a lot of glacial meltwater during the last glacial maximum before letting it percolate out to the Columbia and the Sea … Continue reading

Posted in Geography, Geoid, Geology, Gravity Anomalies, Plate Tectonics | Tagged , , , , , , , | Leave a comment

Hawaii

By incredibly good luck I’ve been spending lots of time in Hawaii lately, on business no less. I stay in this unbelievable house.   One really gets the sense of being out in the middle of the ocean in Hawaii, … Continue reading

Posted in Geography, Geoid, Geology, Gravity Anomalies, Oceanography, Plate Tectonics | Tagged , , , | 1 Comment

Gravity and Magnetism

This post follows the last two which were inspired by discovering that the virtual geomagnetic pole (VGP) wander path during the Laschamp reversal as revealed in Black Sea sediments by the work of Norbert R. Nowaczyk consistently follows lows in … Continue reading

Posted in Geography, Geoid, Geology, Gravity Anomalies, Gravity Potato, Magnetic Reversals, True Polar Wander, Virtual Geomagnetic Pole (VGP) | Tagged , , , , | Leave a comment

Further Musing on the Affinity of Magnetic North for Gravity Holes During the Laschamp Reversal.

We know so little about what this means that it may be helpful to focus on what the gravity geoid is not. The earth is NOT shaped like a potato. Vertical exaggeration is used on nearly all maps to keep them … Continue reading

Posted in Geography, Geoid, Geology, Gravity Anomalies, Gravity Potato, Magnetic Reversals, True Polar Wander | Tagged , , , , , , , | Leave a comment