Petroglyphs in the Boulder City Dry Fall Area. The exact location is unknown, but the location is possibly in Keyhole Canyon. Petroglyphs are pictogram and logogram images created by removing part of a rock surface by incising, picking, carving, or abrading. Outside North America, scholars often use terms such as "carving", "engraving", or other descriptions of the technique to refer to such images. Petroglyphs are found world-wide, and are often associated with prehistoric peoples. The word comes from the Greek words petro-, theme of the word "petra" meaning "stone", and glyphein meaning "to carve", and was originally coined in French as pétroglyphe. The term petroglyph should not be confused with petrograph, which is an image drawn or painted on a rock face. Both types of image belong to the wider and more general category of rock art or parietal art. Petroforms, or patterns and shapes made by many large rocks and boulders over the ground, are also quite different. Inukshuks are also uni

The view of small children having a snowball fight and building snow forts in Boulder City, Nevada. In the background of the image lies the Bureau of Reclamation Administration building located at 1200 Park Street Boulder City, Nevada. Damage to the photograph itself has caused a dark border to form around the image.

Near Fortification Hill, four miles upstream from the Hoover Dam. Boulder Canyon, originally called Devils Gate Canyon, now flooded by the lake. Photograph by Bureau of Reclamation, Boulder City, Nevada.

Cressa Springer Hancock portrait photo when she was about 10 years old; Handwritten note on back of photo: "Cressa Springer to Charlie Paul""; Stamp on back of photo: "T.W. Townsend, Photographic Artist, Iowa City, Iowa".

Identification given with photograph: "Squires family reunion at the C. C. Boyer home in Carson City. Front row: Mrs. Herbert A. Squires, with Kathleen (daughter of John Doherty); Mrs. C. C. (Florence Squires) Boyer, with Charla, daughter of Charles Doherty; Mrs. John H. Doherty with daughter, Susan; Mrs. Charles P. Squires."