At 39 miles long, 19 miles wide and 9 miles deep, it's the second-largest impact structure
Chesapeake Bay Impact Structure
: Development of "Brim" Sedimentation in a Multilayered Marine Target
But very occasionally, I am rewarded by the view of an impact structure
--a piece of terra firma scarred by the universe, right beneath me.
The Vichada Structure is a probable asteroid impact structure
along the Vichada River in Colombia (4[degrees]30'N69[degrees]15'W, Vichada Department, Colombia, South America; figure 1).
The Vredefort structure (a World Heritage Site) is currently regarded as the oldest and largest clearly visible impact structure
on Earth, formed when a gigantic meteorite (larger than Table Mountain) hit the Earth some two billion years ago.
"There is simply insufficient impact structure
on an F1 car to absorb the energy of such an impact without either destroying the driver's survival cell, or generating non-survivable decelerations," it said.
Paleozoic K-bentonites in drill cores from the Siljan impact structure
. In Proceedings of the 3rd IGCP 591 Annual Meeting (Lindskog, A.
Insights into the Michigan Basin; salt deposits, impact structure
, youngest basin bedrock, glacial geomorphology, dune complexes, and coastal bluff stability.
All external parts of the impact structure
have been removed, but the effects of the intense impact shock wave penetrated deep into the crust - far deeper than at any other known crater - and these remain visible.
For example, in the Wells Creek impact structure
in Tennessee, shatter cones are common in the Knox Dolomite over a 1.77 km diameter area, however the diameter of the central uplift is measured at 4.8 km (Wilson and Stearns 1968).