The Mill Creek Nature Preserve is a part of Mill Creek, in the Snohomish County. This location was quite pleasant this quarter, as it is a great park, with many different organisms that pass through.
Screenshot Photo of Mill Creek from Google Maps, Satellite perspective
Screenshot Photo of Mill Creek Nature Preserve from Google Maps, Satellite perspective
Screenshot Photo of Mill Creek Nature Preserve from Google Maps
From my visitation, Mill Creek Nature Preserve is a small area no well known to the public. Once entering, you come upon a fish ladder where trout, every spring, climb back to spawn for the future offspring. Then on the opposite side, there is a large body of water, called Penny Creek, which flows beside the trail throughout the entire preserve. On the opposite side of the trail, there are Bigleaf Maples, Red Alders, shrubs, fallen trees, small plants, grasses, sedges, flowering plants, berries. Even though the Preserve is close to the roads, and stores are nearby, there is still a sense of nature untouched as the plants living there continue to thrive along Penny Creek.
Screenshot Photo of Geomorphological Map of Mill Creek
On the geomorphological map, Mill Creek was labeled as Qgd, which was titled as Undifferentiated glacial drift. There were heterogeneous patchwork of stratified and unstratified sand, silt, clay, and gravel. Locally, it will include till, subglacial outwash, advanced outwash, proximal recessional outwash, and ice-dammed-lake sediment. The sediment color is from gray to tan, and varies from loose to compact. It typically forms geomorphologically complex patchwork of mounds, terraces, incipient to fully developed channels, closed depressions, and erosional exposures of older units. This was predominantly Vashon Drift, but it may also include an older drift. The Vashon Glaciation, the last glacial period during the Pleistocene Ice Age, covered the entire Puget Sound and the Strait of Juan de Fuca, and the Western part of Washington state, upon which occurred and occurring 2.58 million years ago and currently. The Vashon Drift was deposited during the Fraser Glaciation on the southwestern part of the Cordilleran ice sheet, when it filled the Georgia Depression approximately 14 thousand years ago. As the Vashon Lobe retreated, many lakes, such as Lake Washington, Lake Sammamish, and the Puget Sound were formed by erosion. Glacial advance and retreat also created many different geological features such as drumlins, found in Mill Creek.
The type of rocks found at Mill Creek Striated Layers were on the bottom starting at 100 meters, there were interbedded coarse-grayed brown cross-bedded sand and pebbly sand. Then approximately 20 meters above at 80 meters the layering was compact. It was compact to soft alternating gray clay and fine-grained sand. 20 meters above at 60 meters, there was interbedded compact dark brown to gray silt, clay, and fine-grained sand with the occasional find of wood, then 40 meters above at 20 meters is a compact coarse-grained sand and cobble to boulder gravel. Then at the very surface, there is very compact interbedded sandstone to shale.
Photo of Mill Creek Nature Preserve location
Works Cited
Geologyportal.dnr.wa.gov, geologyportal.dnr.wa.gov/.
Google Search, Google, www.google.com/maps/place/Mill+Creek,+WA/@47.859787,-122.2144475,5790m/data=!3m1!1e3!4m5!3m4!1s0x549005dc7463c041:0x7801219e5956768f!8m2!3d47.8600971!4d-122.2042966.
Hicock, Stephen R., and John E. Armstrong. “Vashon Drift: Definition of the Formation in the Georgia Depression, Southwest British Columbia.” Canadian Science Publishing, Canadian Journal of Earth Sciences, 1985, www.nrcresearchpress.com/doi/abs/10.1139/e85-079?journalCode=cjes#.XAc6lfZFyhd.
Minard, J.P. “Explore This Publication in the NGMDB.” Ngmdb.usgs.gov, U.S. Geological Survey, 1 Jan. 1981, ngmdb.usgs.gov/Prodesc/proddesc_11972.htm.
“Vashon Glaciation.” Wikipedia, Wikimedia Foundation, 30 Nov. 2018, en.wikipedia.org/wiki/Vashon_Glaciation.
Yount, J.C., et al. “Explore This Publication in the NGMDB.” Ngmdb.usgs.gov, U.S. Geological Survey, 1 Jan. 1993, ngmdb.usgs.gov/Prodesc/proddesc_12654.htm.
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