Aerial view of a tidal creek on the Burdekin River Delta of NE Australia.

Stacked sandstone beds showing structures indicative of storm deposition in a shallow sea, Permian of New South Wales, Australia.

View of Precambrian sedimentary rocks (cherts) at Ford's Creek in Western Australia.

Exposed corals at low tide on the Great Barrier Reef, Australia.

The unmanned aircraft system group of VORTEX2 with the Tempest unmanned aircraft.

A tornado touched down near Sidney, NE on June 27, 2005.

Bagging samples for later oxygen isotope analysis from a shallow ice core collected on the Greenland ice sheet.

The "scout" (foreground) and "tracker" (background) vehicles that were part of the unmanned aircraft system used during VORTEX2.