IT iconb G.C. Herman, PhD TECTONICS BLOG
Rev. 2021-11-13, 2021-07-26

Welcome to my tectonics blog. I'm a geologist that has mapped and researched Appalachian tectonics and groundwater resources for over three decades.  I am blogging about my observations and interpretations of natural phenomenon that I marvel at and interpret with respect to the structural geological setting. Sometimes these interpretations differ from currently accepted tectonic theory.

We are in a formative stage of understanding most tectonic processes on terrestrial planets. At the coincident onset of the digital age and my career, we didn't have the perspectives that the subsequent technological bloom has afforded us. Modern computing methods and remote sensing innovations now provide the tools to solve old problems in new ways.  But the pace of technological growth and data procurement is outpacing the rate at which our scientific paradigms evolve. A major hurdle facing modern breakthroughs in understanding hidden tectonic processes is the leap to include punctuated, extraterrestrial and catastrophic agents into tectonic theory, now guided solely by uniformitarianism. I suppose periodic bombardment of Earth by bolides is a somewhat uniform temporal process, but the tectonic strain responses stemming from them are variable and subject to tectonic inheritance.

This blog exploits the global connectivity that we currently have with the internet to point out some major aspects of plate-tectonics on both Earth and Mars stemming from catastrophic events that are missing in current plate-tectonic theory.  I try hard to be inclusive by referencing earlier efforts that I am aware of along similar lines. There will be mistakes, but I hope you enjoy and benefit from the content.

2021 Tectonic aspects of three, suspected, large-bolide impacts in the South American region (~124 Ma, 23 Ma, and 15 Ma). 
The Three Amigos
2021 Earth's mantle as an electromagnetic-field component, with implications for geomagnetic reversals
Toroid and poloid
2021 Structural traces and tectonic aspects of 13 Martian astroblemes  
Two antiipodes    
2020-21 Impact experiments using an air pistol, steel projectile, and 60mm glass balls
Impact experiments
2020 The Hydrogeological and Tectonic Nature of the Nazca Lines  
Nazca Lines 
 image icon 877MB mp4 Geological Society of America 14-minute Nazca-Line video
2020 Mid-Cenozoic Tectonic Disruption of the Central Appalachians by the Chesapeake Invader
Chesapeake impact
2020 Impact Tectonics;
Beyond the Craters

2020 Return to Devil's Gate 
Alamo impact and Western USA gold fields
2020 Old Pacific Mayhem; Three Suspected Bolide-Impact Events of Cretaceous Age with Global Consequences 
Old Pacific mayhem
2019 3D SketchUp and Google Earth Model of the Yellowstone Calderas and Farallon Plate
Yellowstone-Farallon plate

2014 Google Earth Continental Geology by Era and Sea-Floor Physiography   
Continental geology by Era
2010 2 Known and 6 Suspected Large-Bolide Impacts on Earth, with Plate Boundaries and Current Plate GPS Horizontal Velocities  Some known and suspected impacts
2007 Plate splitting impact in the Congo Basin; bedrock geology, plate motions and diamonds  
Suspected Congo Basin impact


The Early Miocene Nazca bolide-impact event and the Eastern Pacific swell

The Early Cretaceous Xingu bolide impact in the Brazilian Amazon basin

Prince William Sound, Alaska Late Miocene impact tectonics home * Geoarcheology * Hydrogeology * Web GEOTools