The Weaubleau structure is a probable meteorite impact site in western Missouri near the towns of Gerster, Iconium, Osceola, and Vista.

It is believed to have been caused by a 1,200-foot (370 m) meteoroid between 335 and 340 million years ago[1] during the middle Mississippian Period (Latest Osagean to Earliest Meramecian).

[4] A 12-mile (19 km) circular structure was discovered by geologist Kevin R. Evans through examination of digital elevation data.

Because the site was covered by later Pennsylvanian Period sediments, and only partially exposed to erosion relatively recently, its structure is well preserved, and its age can be determined with fair accuracy.

These 38th parallel structures are thought to possibly be the result of a serial impact, similar to that of comet Shoemaker-Levy 9 on Jupiter, an extremely unlikely event on Earth.