1915 Geological Survey Photos Index Page 1


Plate III.--Castle Rock, A butte capped by Castle Rock Conglomerate. Looking east.	Plate IV.--Castle Rock and mesa in the distance, both capped by Castle Rock Conglomerate. Looking north.	Plate V.--Unconformity at base of Castle Rock Conglomerate at contact with Dawson Arkose in cliffs of Castle Rock : Shows uneven surface of contact and bowlders of rhyolite in basal conglomerate	Plate VI.--Castlewood reservoir and mesa to the east capped by Castle Rock conglomerate : Uncomfortable contact of Dawson arkose and overlying Castle Rock conglomerate occurs in cliffs at left

Plate X.--Typical exposure of Fountain Formation.	Plate XI.--Sculptured erosion forms of fountain formation in southeastern part of Perry Park : "Profile Rock" at right. by Jackson, William Henry, 1843-1942	Plate XII.--Hogback ridges of Perry Park	Plate XIII.--Closer view of hogback ridges of Perry Park

Plate XI.--Sculptured erosion forms of fountain formation in southeastern part of Perry Park : "Profile Rock" at right. by Jackson, William Henry, 1843-1942	Plate XV.--Gateway to Perry Park : Looking east from a point near Bear Creek. Nearly vertical Lyons sandstone in foreground. Hogback in distance capped by Dakota sandstone. Sandstone of Purgatoire formation makes lower cliff and slopes.	Plate XVI.--Gently dipping Paleozoic rocks resting on Pikes Peak granite west side of Bear Canyon, Perry Park	Plate XVII.--White Sawatch Sandstone resting on Pikes Peak Granite, offset apparently by a thrust fault