This observation was requested because of an interesting mineral outcrop identified in CRISM mapping data. It is likely an iron/magnesium phyllosilicate (clay). Syrtis spans some 1,300 km (800 mi) wide, yet rises only about 1 km (3,300 ft) high and is one of the most prominent Hesperian volcanic complexes on Mars.

ID: ESP_075323_1975
date: 21 August 2022
altitude: 276 km

https://uahirise.org/hipod/ESP_075323_1975
NASA/JPL-Caltech/UArizona
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