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Fig. 4

image

Identified and proposed surface features on Iris. Putative impact craters are indicated by names and often with a contour showing the estimated area they cover. Candidates for impact craters are indicated by white-font letters and contours, in italic if the contours were not clearly defined. A question mark indicates the expected position of a feature that could not be identified on the image, likely due to unfavorable illumination.

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