<P> The other theory is an eroded impact crater , like the much younger Meteor Crater near Winslow , Arizona . In the 1990s , a team of geologists and seismologists from NASA and the University of Nevada at Reno performed a detailed study that included seismic refraction and rock mapping . The results of this study support the meteorite theory . In 2008 , it was announced that shocked quartz was discovered . This confirmed the meteor impact theory because the rocks were subjected to high pressures only possible in an impact or a nuclear explosion . </P>
<P> The other theory is an eroded impact crater , like the much younger Meteor Crater near Winslow , Arizona . In the 1990s , a team of geologists and seismologists from NASA and the University of Nevada at Reno performed a detailed study that included seismic refraction and rock mapping . The results of this study support the meteorite theory . In 2008 , it was announced that shocked quartz was discovered . This confirmed the meteor impact theory because the rocks were subjected to high pressures only possible in an impact or a nuclear explosion . </P>
the evidence that upheaval dome was formed by a meteorite impact comes from
the evidence that upheaval dome was formed by a meteorite impact comes from
shocked quartz
shocked quartz