...Hilltop rock outcrops on the area provide excellent protection for the cottontail especially from low temperatures and freezing rain or blowing snow... 
Donald W. Janes 「Home Range and Movements of the Eastern Cottontail in Kansas」
...Along rocky upper slopes between the two outcrops, wherechestnut oak is abundant, elms are relatively scarce and seem unableto compete successfully...
Henry S. Fitch 「The Forest Habitat of the University of Kansas Natural History Reservation」
...Thereare few on hilltops away from the outcrops...
Henry S. Fitch 「The Forest Habitat of the University of Kansas Natural History Reservation」
...Pitfalls made from gallon cans buried in the ground with topsopen and flush with the soil surface were installed in 1949 in severalplaces along hilltop rock outcrops where the frogs were abundant...
Henry S. Fitch 「Field Study of Kansas Ant-Eating Frog」
...The ore outcrops atvarious places and solid nodules or fragments are plentiful...
Gerard Fowke 「Archeological Investigations」
...And he mentallymapped the hills and valleys and the outcrops of metals that he wouldexplore some later time...
Various 「Astounding Stories, May, 1931」
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