G.C. Herman, PhD BLOGS   2021-11-13

2021 Tectonic aspects of three, suspected, large-bolide impacts in the South American region with estimated ages of 124 Ma, 23 Ma, and 15 Ma.
The Three Amigos
2021 Paleo-Indian Clovis point GH1 from along the Susquehanna River North Branch
Clovis point
2021 Stone mounds atop Cushetunk Mountain
2021 Zoom talk
2021 One bad period
on Earth about 800,000 B.P.

Suspected Australian impact strewn field
2021 Earth's mantle as an electromagnetic-field component, with implications for geomagnetic reversals
Toroid and poloid
2020-21 Impact experiments using an air pistol, steel projectile, and 60mm glass balls
Impact experiments  
2021 Structural traces and tectonic aspects of 13 Martian astroblemes  
Two antiipodes    
2020 Some physical aspects of the Giza pyramids: Old-Kingdom Science and Engineering
Khufu construction machine 
2020 Old Pacific Mayhem; Three Suspected Bolide-Impact Events of Cretaceous Age with Global Consequences 
Old Pacific mayhem
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 The Hydrogeological and
Tectonic Nature of the Nazca Lines
Nazca Lines 

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