description Marquez Dome Overview
Marquez Dome is a largely buried complex impact structure in Leon County, Texas. The surface expression is a roughly circular inlier of disturbed Cretaceous rocks, while geophysical and well-log studies place a crater about 13 to 15 km across beneath younger sediments and identify a strongly uplifted central zone. Its central uplift is partly exposed, but the crater rim remains buried, making seismic, gravity, magnetic, and drilling data important to its reconstruction. [NASA technical record](https://ntrs.nasa.gov/citations/19940016409).
help Marquez Dome FAQ
Where is Marquez Dome located?
Marquez Dome is in Leon County, Texas. It is a largely buried impact structure beneath younger sediments, with a circular surface inlier of disturbed Cretaceous rocks.
How wide is the crater beneath Marquez Dome?
Geophysical and well-log studies place the buried crater at roughly 13 to 15 kilometers across. The range reflects reconstruction of a structure that is not fully exposed at the surface.
Is Marquez Dome an exposed meteorite crater?
No. Most of the impact structure is buried, so its crater shape is inferred from underground data and disturbed rocks. Its surface expression is a roughly circular inlier rather than an open crater bowl.
What evidence supports an impact origin for Marquez Dome?
The circular structure, disturbed Cretaceous rocks, and subsurface geophysical and well-log patterns support an impact interpretation. Much of the evidence comes from the buried geometry rather than from a clearly visible crater rim.
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