AmericaSpace Launch Countdown

Next Launch TMA-15M on a Soyuz-FG rocket from Baikonur Cosmodrome, Kazakhstan
scheduled for:
23 Nov 14 21:01:00 GMT
24 Nov 14 3:01:00 ALMT
23 Nov 14 16:01:00 Eastern

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Crater obliteration stages

Fig. 3. Identified types of impact craters with various modification stages. Arrows indicate the illumination direction in each image, while the scale applies to all images. Class 1: (A) fresh crater cluster with ejecta (black) and exposed ice (white). Class 2: (B) small sharp crater. (C) Sharp crater. (D) Sharp crater with some polygonal fractures on the rim and aeolian fill on the floor. (E) Sharp crater with extensive polygonal fractures (note the lack of fractures in the surrounding terrain). Class 3: (F) Well defined but smooth crater. (G) Smooth crater. Class 4 feature: (H) a pit, not necessarily an impact feature. Image and caption provided by Dr. Jarmo Korteniemi

Fig. 3. Identified types of impact craters with various modification stages. Arrows indicate the illumination direction in each image, while the scale applies to all images. Class 1: (A) fresh crater cluster with ejecta (black) and exposed ice (white). Class 2: (B) small sharp crater. (C) Sharp crater. (D) Sharp crater with some polygonal fractures on the rim and aeolian fill on the floor. (E) Sharp crater with extensive polygonal fractures (note the lack of fractures in the surrounding terrain). Class 3: (F) Well defined but smooth crater. (G) Smooth crater. Class 4 feature: (H) a pit, not necessarily an impact feature. Image and caption provided by Dr. Jarmo Korteniemi

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