first flowed southwestward through valley
Deposits of South Fork Campbell Creek. These are
now occupied by lower course of Chester
subdivided into deposits at five levels. Thickness
Creek; there, deposits now found in terrace
remnants. schu are deposits modified by
is probably several meters, except as noted.
urbanization. schp are deposits overlain by
sfs
peat about 1 m thick of mainly Holocene
Southern lower-level deposits (Holocene?
age; schpu are areas that have been drained
sfsu
and late Pleistocene)--Occur in channel
and most peat removed during urbaniza-
that carried South Fork water at one or
tion.
more times after deposition of main fan.
scf
Channel now contains underfit North
Alluvial-fan deposits (late Pleistocene)--
scfu
Thickness may be more than 10 m. Occur in
Fork Little Campbell Creek, developed
prominent fan that extends along Ship
from underflow of South Fork Campbell
Creek from Chugach Mountain Front to
Creek, which currently flows only about 1
Glenn Highway. Fan appears graded to
m below the level of this channel. There is
various levels of Nunaka Valley and Moun-
danger that at times of high water it could
tain View deposits. scfu are deposits exca-
reoccupy this channel, perhaps on a long-
vated in conjunction with regional urban-
term basis, and thereby flood at least some
ization.
part of the channel area. sfsu are deposits
Terrace deposits (late Pleistocene)--Occur
sct
modified by urbanization.
sctu
near head of Ship Creek alluvial fan in rem-
sfn
Northern lower-level deposits (late Pleis-
nants of small, higher-level alluvial fan, or
sfnu
tocene)--Occupy channel and smaller
of fan-delta graded to level of glacioestua-
alluvial fan that could have carried some
rine water in which Muldoon Road depos-
South Fork and probably all North Fork
its accumulated. sctu are deposits excavat-
Campbell Creek waters northward into a
ed in conjunction with regional urbaniza-
combined ancestral Ship Creek and Eagle
tion.
River. sfnu are deposits modified by
scth
urbanization.
Highest-level deposits (late Pleistocene)--
sf
Occur near head of Ship Creek alluvial fan
Deposits of main alluvial fan (late Pleis-
in remnants of probable fan-delta graded to
tocene)--Thickness probably 10 m or more.
level of glacioestuarine water in which
Occupy prominent alluvial fan lying mainly
Abbott Road deposits accumulated.
on south side of South Fork; extend up-
valley from apex of fan as low-level terrace
Deposits of North Fork Campbell Creek (late Pleis-
deposits.
tocene). These are subdivided into deposits at three
sft
Terrace deposits (late Pleistocene)--Occur
levels. Thickness is probably a few meters, except
only in scattered terrace remnants at inter-
as noted.
mediate levels in upper South Fork Valley.
sfth
Highest-level deposits (late Pleistocene)--
nfl
Lower-level deposits--Occur in channels
Occur only in scattered terrace remnants
on both sides of main alluvial fan of North
at high levels in upper South Fork Valley.
Fork Campbell Creek that were not neces-
sarily occupied contemporaneously.
Alluvial deposits of the lower Hillside area (late
Main alluvial-fan deposits--Thickness
nf
Pleistocene). These are the deposits of two princi-
probably several to 10 m. Occur in promi-
pal southwest-trending channel and terrace sys-
nent fans along North Fork Campbell and
tems that lead to deltas (west of the map area)
Chester Creeks where they have descended
that formed marginal to ancestral Cook Inlet.
from Hillside area; mapped also in low ter-
Thickness is probably a few to several meters.
race remnants farther up North Fork
Contacts are well defined. Topography is smooth,
Campbell Creek Valley.
with slopes being gentle to very gentle.
nfh
Higher-level deposits--Occur mainly in
nfhf
higher part of alluvial fan of Chester Creek;
Spring Hill deposits--Occupy channel sys-
sh
also in single high-terrace remnant along
shu
tem that extends from near apex of main
North Fork Campbell Creek. nfhf are proba-
alluvial fan of South Fork Campbell Creek
bly sand and silt with peat at surface; occur
and that splits into a more deeply incised
in single channel north of Chester Creek.
channel to the southwest and a shallower
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