Living Reference Work Entry

Encyclopedia of Planetary Landforms

pp 1-7

Date: Latest Version

Ring-Mold Crater

  • Gro Birkefeldt Møller PedersenAffiliated withNordic Volcanological center, University of Iceland Email author 

Definition

Concentric crater, shaped like a truncated torus similar to the kitchen item (Kress and Head 2008, 2009).

Description

Ring-mold craters (RMCs) are rimless, concentric crater landforms with a circular outer moat and a variety of interior morphologies including central plateaus, pits, bowls, mounds, or multiple rings (Fig. 2), and they are named for their similarity to the cooking implement called ring mold (Kress and Head 2008). Ring-mold craters are best observed on images with a spatial resolution of 10 m/pixel or better (Pedersen and Head 2010).

Subtypes

Central plateau, central pit or bowl, multi-ring, and central mound (Fig. 2, Kress and Head 2008).

Morphometry

Ring-mold craters are small-scale craters with diameters ranging from ca. 50 m to <1 km with observed average diameter between 100 and 200 m. Ring-mold craters are typically larger than the associated bowl-shaped craters, which also are found in lineated valley fill, lobate debris aprons, and concentric crater fill (Bake ...

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