This image features an interesting circular outcrop of rock that appears dark in infrared but in Context Camera data, appears to be a much rougher terrain surrounding a knob. It is possible this is the remnant of an ancient cinder cone and surrounding lava field. The area might be on a postulated shield volcano with its caldera to the north. Or is it a deposit of minerals from fumaroles similar to those found near Home Plate that the Spirit rover explored?

ID: ESP_077125_1525
date: 8 January 2023
altitude: 254 km

https://uahirise.org/hipod/ESP_077125_1525
NASA/JPL-Caltech/University of Arizona
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