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Artifacts include birdstones, blocked-end smoking pipes, boatstones, cord-marked pottery, engraved stone tablets, and hammerstones.

The earliest known are Solutrean points of the Upper Palaeolithic.

The problem is that earthquakes start out many miles beneath the surface, too deep for us to observe them directly.

So we study them from afar by (1) observing the geological changes at the ground surface, (2) analyzing the symphony of earthquake vibrations recorded on seismographs, and (3) monitoring the tectonic changes in the Earth’s crust by surveying it repeatedly, using land survey techniques for many years and now using satellites.

Removing your hands causes the balloon to return to its former shape (Figure 3-1, lower left).

If you take a thin board and bend it with your hands (Figure 3-1, right), the board will deform.

The peak is in Mount Diablo State Park, a state park of about 20,000 acres (8,000 ha).

It is known for its ceremonial and complex burial practices involving the construction of mounds and by a high level of craftwork and pottery. SYNONYMS OR RELATED TERMS: projectile point, arrow-head CATEGORY: artifact DEFINITION: A small object of bone, metal, or stone that has been formed as the pointed end of an arrow for penetration and is often found at sites of prehistoric peoples.In this study, scenarios testing different dam-operation strategies and hypothetical dam-outlet structures were simulated using CE-QUAL-W2 hydrodynamic/temperature models of the Middle Fork Willamette River system from Hills Creek Lake to Lookout Point and Dexter Lakes to explore and understand the efficacy of potential flow and temperature mitigation options.Model scenarios were run in constructed wet, normal, and dry hydrologic calendar years, and designed to minimize the effects of Hills Creek and Lookout Point Dams on river temperature by prioritizing warmer lake surface releases in May August and cooler, deep releases in September December.Each year, summer releases from the dams typically are cooler than pre-dam conditions, with the reverse (warmer than pre-dam conditions) occurring in autumn.This pattern has been detrimental to habitat of endangered Upper Willamette River Chinook salmon (Oncorhynchus tshawytscha) and Upper Willamette River winter steelhead () throughout multiple life stages.The goal of this study is to evaluate and characterize relations between streamflow, geomorphic processes, and black cottonwood () recruitment on the Middle Fork Willamette and Mc Kenzie Rivers, western Oregon, that were hypothesized in earlier investigations.

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