21. To the east of the crater rim is a smaller rille designated Rima R�aumur. 22. This rille is part of a nearby system that has the designation Rimae Aristarchus. 23. The eastern part of this area is notable for a series of rille systems. 24. In the southern part of this area is a rille system designated Rimae Archimedes. 25. Moving on, they traveled to the rille . 26. A rille named Rima R�aumur runs from this site to the outer wall of R�aumur. 27. The crater lies at the southern end of a rille that proceeds towards the north. 28. About 60 kilometers to the west of Herigonius is a sinuous rille designated Rima Herigonius. 29. Where the bay joins the mare, rille systems extend to the north and south. 30. Apollo 15 explored smaller peak Mons Hadley Delta ( ? ) and Rima Hadley rille .
