This photo shows an outcrop on Mars; the image was transmitted to ...

[Anajune7]

This photo shows an outcrop on Mars; the image was transmitted to Earth by a robotic rover traveling over the Martian surface.
 
  When geologists saw this image, some of them suggested that the rocks could be evidence of flowing water at some point in Martian history. What do you see to support that hypothesis? What process other than flowing water might produce the features visible in the photo? What additional information would you use to distinguish between these two hypotheses?
  What will be an ideal response?

Question 2

Look ahead to Figure 19.24, which shows three beach deposits. If each deposit became a rock, what would be the name for each rock formed? Be as specific as possible in selecting a name.
 
  What will be an ideal response?

[anyusername12131]

Answer to Question 1

The photo appears to have cross-bedding which could support a hypothesis for claiming sediment movement by flowing water. Cross-bedding can form from both water and wind. This means that these cross-beds could have also formed in the absence of water. Wind cannot transport pebbles while flowing water can. So, examining the grain size may distinguish water and wind currents as agents for forming cross-bedding.

Answer to Question 2

(a) would be called a quartz sandstone because the grains are sand-sized and since most are made up of quartz, I would put quartz as a modifier in front; (b) would be called a lithic sandstone because the grains are sand-sized and made up of basalt; (c) would be called a fossiliferous limestone because it is made up of shell fragments and these are made up of calcite and the cement would most likely be calcite (also could be called coquina, although that term is not used in How Does Earth Work?).