Glacial erratic boulders of Kitsap County, Washington

Glacial erratic boulders of Kitsap County are large glacial erratic boulders of rock which were moved into Kitsap County, Washington by glacial action during previous ice ages.

Kitsap County was so extensively formed by glaciation that according to J Harlen Bretz almost any east-west traverse across the Kitsap Peninsula (shared with two other counties) will describe an ascending and descending profile across till ridges.[1]

List of boulders

Frog Rock, dynamited, moved off the road, and stacked in 20th century 47.69612°N 122.52347°W / 47.69612; -122.52347 (Frog Rock)
Haleets, at Agate Point on Bainbridge Island, has petroglyphs said to be from before 400 CE 47°43′07.1″N 122°32′40.1″W
Illahee Preserve erratic At Illahee Preserve Almira parking lot[2] 47.6141°N 122.6225°W / 47.6141; -122.6225 (Illahee Preserve erratic)
Illahee Road erratic, an "extremely large erratic of volcanic rock"[3] 47.60066°N 122.60268°W / 47.60066; -122.60268 (Illahee Road erratic)
Lone Rock, the namesake landmark of the unincorporated community of Lone Rock, located on the Hood Canal tidal flat about 400 feet off shore. At least 50 feet (15 m) across.[4] 47.66297°N 122.769916°W / 47.66297; -122.769916 (Lone Rock)

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References

Bretz, J Harlen (1913), Glaciation of the Puget Sound Region (PDF), Washington Geological Survey, p. 220
Illahee Preserve Stewardship Committee (February 23, 2015), Illahee Preserve Stewardship Plan (revised working draft) (PDF), archived from the original (PDF) on March 4, 2016, retrieved April 20, 2015
Sceva, Jack E. (1957), "Geology and Ground-Water Resources of Kitsap County Washington" (PDF), Water-Supply Paper 1413, U.S. Geological Survey, p. 22
Measured on Google Maps overhead imagery August 24, 2017.

External links

Washington glacial erratics project at University of Washington dept. of earth and space sciences

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[1] Bretz, J Harlen (1913), Glaciation of the Puget Sound Region (PDF), Washington Geological Survey, p. 220

[2] Illahee Preserve Stewardship Committee (February 23, 2015), Illahee Preserve Stewardship Plan (revised working draft) (PDF), archived from the original (PDF) on March 4, 2016, retrieved April 20, 2015

[3] Sceva, Jack E. (1957), "Geology and Ground-Water Resources of Kitsap County Washington" (PDF), Water-Supply Paper 1413, U.S. Geological Survey, p. 22

[4] Measured on Google Maps overhead imagery August 24, 2017.