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from google text:
THE MOUNTAINS
The Deem Hills Preserve is primarily composed of Precambrian Era granite and Tertiary Period basalt.
The black boulders of basalt are remains from historic lava flows from volcanic activity from currently dormant volcanoes near Flagstaff. These 1.6 million year old lava flows broke through the earth's surface in this area. The other adjacent mountains of black basalt found in the area were also created by ancient volcanoes of northern Arizona.
DEEM HILLS PARK AREA 1969 Master Plan
The original master plan showed overnight camping areas, hiking and interpretive trails, a scenic drive that wrapped around the mountain, and developed picnic areas. The area was intended to expand to provide additional space for outdoor activities.
DEEM HILLS PRESERVE ROAD
The name of these mountains come from early 20th century settlers to the area. Dennis and Carl Deem settled in the area in 1922 and began homesteading the 160 acres desert land just southwest of the hills. The hills now carry on their family name. DEEM BROTHERS HOMESTEAD 1949 Acrial
GEOLOGY
The rocks found in the Deem Hills Preserve were prized by native Hohokam people for hundreds of years. The basalt was especially useful for tools like manos and metates, which are stones commonly used for grinding grains into flours. They were also shaped into hammers and axes.
The chalcedony (pronounced kal-sed-nee) is a white rock used for arrowheads, knives, and scrapers. This rock was highly coveted and was more than likely used for trading purposes.
THE MOUNTAINS
The Deem Hills Preserve is primarily composed of Precambrian Era granite and Tertiary Period basalt.
The black boulders of basalt are remains from historic lava flows from volcanic activity from currently dormant volcanoes near Flagstaff. These 1.6 million year old lava flows broke through the earth's surface in this area. The other adjacent mountains of black basalt found in the area were also created by ancient volcanoes of northern Arizona.
DEEM HILLS PARK AREA 1969 Master Plan
The original master plan showed overnight camping areas, hiking and interpretive trails, a scenic drive that wrapped around the mountain, and developed picnic areas. The area was intended to expand to provide additional space for outdoor activities.
DEEM HILLS PRESERVE ROAD
The name of these mountains come from early 20th century settlers to the area. Dennis and Carl Deem settled in the area in 1922 and began homesteading the 160 acres desert land just southwest of the hills. The hills now carry on their family name. DEEM BROTHERS HOMESTEAD 1949 Acrial
GEOLOGY
The rocks found in the Deem Hills Preserve were prized by native Hohokam people for hundreds of years. The basalt was especially useful for tools like manos and metates, which are stones commonly used for grinding grains into flours. They were also shaped into hammers and axes.
The chalcedony (pronounced kal-sed-nee) is a white rock used for arrowheads, knives, and scrapers. This rock was highly coveted and was more than likely used for trading purposes.