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PZ Crater Outlines

Bruise Impact


Trench Crater


PZ Terminal Fan Crater


PZ Combination Trench-Fan

Anomalous Landforms as Cometary Impact Craters

We propose that an individual ejecta landform’s arrival velocity vectors are evidenced in its orientation, and as such are visible in its remote sensing visual record. This datum is used to infer a trajectory azimuth. By correlating geodesic azimuth readings from multiple PZ ejecta emplacements, we attempt the identification of specific causal impact site.

A striking example of a Perigee: Zero "Impact" signature is a haunting fan shaped signature spread across northern Kansas and southern Nebraska. The image is a 750x750 GlobeXplorer image, full size available via the link.


Kansas to Nebraska Fan Impact Trace

The model we propose for cometary impact craters was used to further identify the causal impact crater. A significant number of specific terrestrial landform features are presented as candidate impact structures. The scale of the craters presented range from a 270km x 300km structure on the north coast of the Canadian Northwest Territories, to the 1000km diameter Grand Erg Oriental structure in North West Africa.

Three distinct Perigee: Zero Impact landforms are suggested by our research.

1. “Bruise” event results in a superficial removal of material without significant cratering artifacts.
2. 
   
3. "Trench" events create linear scars in the landscape as the comet dips briefly into the crust of the earth at Perigee: Zero
4. 
   
5. "Terminal Fan" events create an singular impact mark, followed by a growing fan of damage as the comet is dissipated across the landscape.

We offer a gallery of Fan and Trench Craters, the vast majority of which are unlikely to be Perigee-Zero event artifacts due to their sheer scale.

A specialized case combining a Trenching event with a Terminal Crater event has been seen in our research. We interpret the resulting structure as the manifestation of an event which begins as a Trench interface at Perigee: Zero, but transitions to a Terminal Fan when the orbital path enters an area of significantly higher elevation. This situation can be seen in the Himalayan mountains at the Katmandu Plateau.

Katmandu Plateau