Surprisingly, the crater’s age coincides with Mexico’s Chicxulub impact event ... The seismic data showed a large, circular depression measuring over 8.5 kilometers wide, which he hypothesized ...

Geologist Uisdean Nicholson was studying seismic reflection data of the Guinea Plateau, a large expanse of flat ... s still visible as the Chicxulub crater in Mexico. The researchers used computer ...

A second, smaller space rock smashed into the sea off the coast of West Africa creating a large crater during ... left the 180km-wide Chicxulub crater in Mexico. That one ended the reign of ...