ringwall

The priest is lost, somewhere in the forbidden interior of the huge lunar crater (or ringwall) Alphonsus.

Ten Minutes, That's It Benjamin Kral 2010

They reached the foot of the ringwall and Kinsman dropped to his knees.

Ten Minutes, That's It Benjamin Kral 2010

It took a painful half-hour to reach the ringwall crest.

Ten Minutes, That's It Benjamin Kral 2010

If his reasoning was correct, they would want the nuke to go off over the solar farms inside Alphonsus's ringwall after the Peacekeeper assault force had arrived on the other side of the mountains, shielded from the nuke's radiation pulse, and ready to cross Wodjohowitcz Pass as soon as the explosion had knocked out Moonbase's main electrical power supply.

Moonwar Bova, Ben, 1932- 1997

Everyone in the base thought they were safe and snug, dug into the side of the ringwall mountain they had named Yeager.

Moonwar Bova, Ben, 1932- 1997

His ship had never designed to rest in a planetary gravity well or Luna had neither, and his pilots were immensely skilled. chain of compartments that made up his vessel sprawled like a discarded, half-opened bracelet, deep in the small crater ringwall.

In Alien Hands Shatner, William 1997

There are at least three hundred armed and trained troops on the other side of the ringwall.

Moonwar Bova, Ben, 1932- 1997

There aren't any easy passes over the ringwall up in this region.

Moonwar Bova, Ben, 1932- 1997

Alphonsus was so big its ringwall mountains disappeared beyond the short lunar horizon.

Moonwar Bova, Ben, 1932- 1997

There was scarcely any privacy in the tractor, crowded with troops and the seven volunteers, all in spacesuits, but once they were safely parked in the lee of Alphonsus's ringwall mountains, Giap clambered down onto the dusty regolith soil for a quick inspection of his vehicles.

Moonwar Bova, Ben, 1932- 1997