A text-book of general astronomy : for colleges and scientific schools (1888)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston ; London : Ginn & Company · leaf 180
ome cases several hundredmiles, straight through moun-tain and valley, without anyapparent regard for the ac-cidents of the surface.They seem to be deepcracks in the crust of oursatellite. Several of themare shown in Fig. 86. Most curious and interesting of all are the light-colored streaks or… … Apennines (Nasmyth). 108 THE MOON. reference to the general surface. They pass across mountain andvalley, and sometimes through craters without any change in widthor color. We do not know whether they are like the so-called tw trap-dvkes on the earth, — fissures which have been filled up from…
Astronomy
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