The largely elongated shallow lakes mainly appear in the megadune area in the southeastern margin of the desert.

Along the southeastern margin of the Net Lake-Vermilion Lake Deformation Zone lies the abandoned Beanland Mine property.

Tectonics has also affected this crater, by influencing the final, polygonal shape of the crater as well disrupting the southeastern and northwestern margins of the crater following its formation.

The Coronado National Memorial is in the southeastern margin of the range near the international border.

These quartz veins are on the southeastern margin of the Net Lake-Vermilion Lake Deformation Zone, which is known for a high frequency of gold occurrences.

Cribarth on its southeastern margin is known locally as the Sleeping Giant, after the appearance of its profile from Cwm Tawe to the south.

Towards the eastern, southeastern and western margins of the county are successive layers of rocks of Carboniferous age.

The islands of Bermuda are located on the southeastern margin of the Bermuda Pedestal.

Examination of the sediments and associated fossils allows th deeper centre of the basin to be distinguished from shallower 'platform' areas along its southeastern margins.

In addition, fractures have disrupted the southeastern margin of the crater.