It is an evaporite formed in an ancient seabed which were deposited more than 200 million years ago, in the Permian Period.

The small unit of Mamelukes moved into the end­less dust of the ancient seabed.

The reek of terror and of ancient seabeds evaporated with the mists.

Fossil records show that, in the Paleozoic and early Mesozoic eras, much of the county was an ancient seabed.

In 1910, drillers looking for oil hit the hot springs that service the hotel, remains of an ancient seabed.

Under the North Slope is an ancient seabed - the source of the oil.

Limestone and sandstone were formed on an ancient seabed and slowly lifted by movement in the earth's crust.

Most of the ancient seabeds are now exposed.

The sun was rising fast, and the dust would soon begin to kick up off the ancient seabeds as the first storm of the day began.

Slightly more than a thousand kilometers to the south the expedition crawled forward over the ancient seabed.