The Shirshov Ridge is located on the eastern border of the Commander Basin

Commander Basin

The Commander Basin is located between the Shirshov Ridge and the Kamchatka Peninsula. Its southern boundary is the Aleutian arc and occupies the western part of the Bering Sea. The Kamchatka Strait provides a deep water access to the basin from the southwest.The basins sedimentary cover is less...

 below the Kamchatka Peninsula

Kamchatka Peninsula

The Kamchatka Peninsula is a peninsula in the Russian Far East, with an area of . It lies between the Pacific Ocean to the east and the Sea of Okhotsk to the west...

. It extends directly southward for a distance of 750 km toward the Aleutian arc in the eastern part of the Bering Sea

Bering Sea

The Bering Sea is a marginal sea of the Pacific Ocean. It comprises a deep water basin, which then rises through a narrow slope into the shallower water above the continental shelves....

 (see figure).

The Shirshov Ridge rises 2–2.5 km above the surrounding basins. Although not immediately evident from the morphology, the Shirshov Ridge southern end extends to meet the northwestern-most portion of Bowers Ridge

Bowers Ridge

The Bowers Ridge is located in the southern part of the Aleutian Basin. It extends over 900 km in an arc, starting in the southeast at the Aleutian Arc and terminating to the northwest at the Shirshov Ridge. The Bowers Ridge arc separates the Aleutian Basin from the Bowers Basin, which it...

. The continuity is evident in structural maps of basement rocks, in magnetic surveys, and in free air gravity field surveys. The connection has been distorted by a sinistral shear fault, which has displaced the point of connection by ~350 km.