REP17182

• Permit No: M1993041
• IBM Index Class Name: Report
• Doc Date: 3/1/1994
• Doc Name: PREHISTORIC HISTORIC & GEOLOGIC PROPERTIES PRESERVATION PLAN DOW FLAT BOULDER CNTY COLO
• Media Type: D
• Archive: No

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site (Cassells 1983:48). Kalasz et al. (1992:29) note that a large
proportion of known Clovis sites in continental North America are
concentrated along the eastern flanks of the Rocky Mountains and
within the adjacent plains region. Clovis occupations in
northeastern Colorado are represented by isolated surface finds and
intact deposits. Intact Colorado Clovis sites, such as Dent,
Claypool, and Dutton contain the butchered remains of mammoth and
other extinct mammals. Such sites represent components of a
hunting oriented lifeway that occurred globally during the late
Pleistocene.
By approximately 10,500 years B.P. Clovis projectile points
were replaced by a form indicative of the Folsom period. This
technological change coincided with a shift away from primary
dependence on mammoth to increased exploitation of Pleistocene
bison (Bison antiquus). The largest and most thoroughly
investigated Folsom occupation in northeastern Colorado is the
Lindenmeier site, located north-northeast of the study area in
Larimer County.
The majority of Paleo-Indian sites or components represent the
Plano period, which began by ca. 9000 years B.P.. This period
includes several technologically related complexes, most notably
Agate Basin, Hell Gap, and Cody. Increased exploitation of plant
resources is indicated at one Plano period site in eastern Colorado
(Wheat 1979). Some researchers feel that a greater level of social
organization is indicated at certain Plano period sites than at
earlier Paleo-Indian occupations (Kalasz et al. 1992:26).
3.1.2 Archaic Stage
The Archaic Stage is divisible into Early, Middle, and Late
periods. By approximately 7,000 years B.P. cultural materials
indicative of the Plano period of the Paleo-Indian stage began to
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