Upper Cook Inlet region and Matanuska Valley

Water-supply aquifers at Eagle River, Alaska

“…The first hole drilled at the site, test hole ER3, Much of the lowland of the midvalley area is mantled with ground moraines (map unit Qmg, shown by Schmoll and others, 1980) that correlate with the till observed in the measured section (sheet 2). Reger and Updike (1983) assigned an age of late Wisconsinan to surficial deposits of this area, and this age is consistent with the conclusion of Schmoll and others (1980) that the upper part of map unit Qmg correlates with deposits in the Elmendorf moraine southwest of Eagle River. The Elmendorf moraine is an end moraine caused by the advance of the Knik-Matanuska glacial lobe (Schmoll and others, 1984) during the late stade of the Naptowne Glaciation, which ended approximately 10,000 to 11,000 yr ago (Reger andupdike, 1983).…”

“…The unit does not correlate with any surficial map units of Schmoll and others (1980) or Yehle and Schrno11(1989), but it does correlate with an advance outwash deposit shown in map and cross-section views by Miller and Dobrovolny (1959) and by Yehle and others (1990) near the mouth of the Eagle River and with an advance outwash unit mentioned by Reger and Updike (1983) near the GlennHighway bridge over theEagleRiver. Karlstrom (1964) also notes the existence of an advance outwash unit under the Elmendorf moraine on the west side of Knik Arm.…”

Geomorphology and bank erosion of the Matanuska River, southcentral Alaska

“…Glacial deposits can be identified near the present Matanuska Glacier, and deposits near Palmer have been interpreted as till, morainal, and outwash deposits in sequences up to a few hundred feet thick (Trainer, 1960;Freethey and Scully, 1980;Reger and Updike, 1983). Strong winds that entrain sediment from the braid plain or banks have left a prominent loess cap on many banks near the river (Trainer, 1961;Muhs and others, 2004) and modern sand dunes at sediment bluff tops near Palmer.…”

Surficial geologic map along the Castle Mountain Fault between Houston and Hatcher Pass Road, Alaska

“…Deposits from this stade in the map area include: glacial till (Qg), lateral moraine (Qml) and kame terrace (Qk) deposits. Older episodes of glaciation have been inferred by a number of workers (e.g., Karlstrom,1964;Reger and Updike, 1983;Reger and Updike, 1989;Schmoll and Yehle,1986). The ridge above and north of the map area, Bald Mountain Ridge, is rounded in contrast to higher areas of the Talkeetna Mountains to the east.…”