Abalos Undae

It is one of the officially named northern circumpolar dune fields, along with Olympia, Hyperboreae, and Siton Undae, and also one of the densest of the region.

[2][3][4] It is theorised that the dunes of the Abalos field may have resulted from erosion of Rupes Tenuis (Latin: Thin Cliff), the polar scarp.

[1] Abalos Undae is a dune field on Mars, in the periphery of Planum Boreum, the Martian north pole.

It is a part of the northern circumpolar dune fields, along with Olympia, Hyperboreae, and Siton Undae, which are officially named after nearby classical albedo features.

[7] The gypsum of Abalos Undae may be eroding due to scouring action by substrates of bedrock involved in plains formation.

Abalos Undae dunes at Abalos Scopuli, the scarp of Abalos Mensa . The ice layers on the cap and basal formations are also visible. The picture was taken by the HiRISE camera on board the Mars Reconnaissance Orbiter and was enhanced by NASA in RGB colour.
Stereographic projection map showing the density distribution of dune fields in the Planum Boreum region. The grey regions are lower density fields. The four densest dune fields including Abalos Undae are shown in black. The prime meridian is at the bottom of the map. Abalos Undae is the smaller black region at centre left, between longitude 261.4°E to 283.03°E (76.97°W – 98.6°W).