Approx. 1/4 the way down and on the right hand side of the pic is a dark streak running almost straight up. Across the valley is a cone with possible spillage down its slopes, accompanied with what could be a white plume, also running almost straight up the page. Closer examination of the immediate area reveals a number of smaller cones, some displaying similar smoking features.

Note that the region investigated also appears to be rise (a shallow geothermal dome?) in the Martian surface (the initial jpeg is a detail of the widened end of the upper fissure to the middle-right of this pic.)

I claim nothing here, Justin. It’s merely an -- anomaly -- that I reported a couple years ago. I believe it was Nick who stated at the time that there was a lot to see in the photos, but geothermal activity was not one of them. Geologist Peter Ness seemed to disagree.

;^)
Dan