Fig. 1: Examples of ‘certain’ grabens.
From: Widespread small grabens consistent with recent tectonism on Mercury
a, Calypso Rupes (image frame EN1014011971M) with some of the largest certain grabens on Mercury. b,c, Alpha Crucis Rupēs (image frames EN0231136925M, EN0231136927M and EN0231136960M; b) and Alvin Rupes (image frame EN1015167012M; c) with horsts and grabens near the crest of the fold; black arrows and ‘p’ identify additional ‘probable’ grabens. d, Zapiola Rupes (image frames EN1052963740M and EN1052963743M overlain on H01 HIW mosaic) with examples of some of the smallest and shallowest certain grabens on Mercury. More examples are available in Extended Data Figs. 1–5. Credit: MESSENGER images from NASA/JHUAPL/CIW.
