Version 1.0 of the Chewelah 30' x 60' geologic map database comprises six
coverages, of which two contain geologic data, two contain DLG derived
geo-reference data, and two contain cartographic line entities.
Geologic data represented by line entities and the polygons they delineate
are contained in the coverage CHEW_GEO. For display purposes, the geology
coverage contains two annotation subclasses: anno.geo contains unit labels,
and anno.fault contains formal, fault names.
Feature attribution and item definitions are as follows:
CHEW_GEO.PAT:
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
1 AREA 4 12 F 3
5 PERIMETER 4 12 F 3
9 CHEW_GEO# 4 5 B -
13 CHEW_GEO-ID 4 5 B -
17 LABL 35 35 C -
52 PLABL 35 35 C -
87 SHDPS 3 3 I -
90 SHDFIL 3 3 I -
93 NAME 320 320 C -
LABL geologic map unit label, in plain text
The following geologic units (LABL) and their corresponding names (NAME)
are identified in the Chewelah 30' x 60'quadrangle:
Qm Mine tailings
Qls Landslide deposits
Qag Galcial and alluvial deposits
QTs Consolidated alluvial and (or) glacial deposits
Tcl Clay deposits
Tcr Columbia River Basalt Group
Tt Tiger Formation
Tcs Conglomerate and sedimentary breccia
Tcb Chlorite breccia and cataclastic rocks associated
with the Newport Fault
Tcc Tectonic breccia of Cusick Creek
Tbl Cataclastic rocks of Bayley Lake
Ts Sanpoil Volcanics
Thd Hypabyssal dikes
Tsp Silver Point Quartz Monzonite
Tam Quartz monzodiorite of Ahern Meadows
Tll Quartz monzonite of Loon Lake
To O'Brien Creek Formation
Kmm Monzogranite of Midnight Mine
Klr Monzogranite of Little Roundtop
Kbgm Muscovite monzogranite of Blue Grouse Mountain
Ksh Starvation Flat Quartz Monzonite, hornblende-biotite
monzogranite and granodiorite
Ksha Starvation Flat Quartz Monzonite, Arden pluton
Kfl Fan Lake Granodiorite
Kc Biotite monzogranite of Camden
Kdc Two-mica granodiorite of Dubius Creek
Kgp Galena Point Ganodiorite
Kb Blickensderfer Quartz Monzonite
Khlc Granodiorite of Hall Mountain, Loop Creek pluton
Kpl Phillips Lake Granodiorite
Kli Leucocratic intrusive rocks
Knb Two-mica monzogranite of North Basin
Knc Monzogranite of Narcisse Creek
Kbm Monzogranite of Big Meadows
Koc Monzogranite of Otter Creek
Klgs Leucocratic granitic rocks of Scotia
Ksv Granodiorite of Spring Valley
Kbr Two-mica monzogranite of Blanchard Road
KJcc Hornblende-biotite quartz diorite of Cusick Creek
Jlm Quartz monzodiorite of Lane Mountain
MzPzf Fault-zone rocks
JTrft Flowery Trail Granodiorite
MCu Carbonate and clastic sedimentary rocks, undivided
Ml Limestone
MD3 Dolomite and slate
MD2 White and pale-gray dolomite
MD1 Dark-gray dolomite
Ddl Dolomite and limestone
Ol Ledbetter Formation
OCgc Phyllite and quartzite of Gardiner Creek
OCmu Metaline Formation, undivided part
OCms Metaline Formation, shaly limestone member
OCmd Metaline Formation, thick-bedded dolomite member
OCml Metaline Formation, thick- and thin-bedded
limestone member
OCmld Metaline Formation, dark-gray dolomite beds
OCmq Metaline Formation, limestone and
carbonate-bearing quartzite member
CZau Addy Quartzite, undivided part
Cau Addy Quartzite, upper member
Cac Addy Quartzite, coarse-grained member
CZap Addy Quartzite, purple member
Zal Addy Quartzite, lower member
Zmu Monk Formation, undivided part
Zma Monk Formation, argillite member
Zmc Monk Formation, conglomerate member
Zmg Monk Formation, greenstone member
Zhg Huckleberry Formation, greenstone member
Zhgc Huckleberry Formation, volcanic conglomerate
Zhi Huckleberry Formation, intrusive greenstone
Zhc Huckleberry Formation, conglomerate member
Ydtu Deer Trail Group, undivided part
Ybu Buffalo Hump Formation, undivided part
Yba Buffalo Hump Formation, argillite
Ybq Buffalo Hump Formation, quartzite
Ys Stensgar Dolomite
Ym McHale Slate
Ywcu Wabash Detroit Formation and Chamokane
Formation, undivided
Ywd Wabash Detroit Formation
Ywdg Wabash Detroit Formation, greenstone
Ycc Chamokane Creek Formation, carbonate-bearing rocks
Yccq Chamokane Creek Formation, vitreous quartzite
and argillite
Yt Togo Formation
Ybmh Bonner Formation, Mount Shields Formation, and
argillite of Half Moon Lake, undivided
Ybo Bonner Formation
Yms5 Mount Shields Formation, Member 5
Yms4 Mount Shields Formation, Member 4
Yms3 Mount Shields Formation, Member 3
Yhm Argillite of Half Moon Lake
Yssh Shepard Formation, Snowslip Formation, undivided
Yssw Shepard Formation, Snowslip Formation, and
Wallace Formation, undivided
Ysh Shepard Formation
Ywr Wallace Formation and Ravalli Group, undivided
Yss Snowslip Formation
Yw Wallace Formation
Ye Empire Formation
Ysr St. Regis Formation
Yr Revett Formation
Ybk Burke Formation
Yd Mafic sills
Yp Prichard Formation
Ypm Metamorphosed part of the Prichard Formation
Ynl Newman Lake Gneiss
sgg Schist, gneiss, and leucocratic granitic rocks
Bodies of water are designated - water body.
PLABL coded geologic map unit label used to generate plot labels with
relevant stratigraphic symbols. The geologic units with LABL designating
Paleozoic (Pz), Cambrian (C), Mesozoic (Mz), and Triassic (Tr) have PLABL
with substitute characters, |, _, }, and ^ respectively, that call their
corresponding symbols from the GeoAge Font Group. Geologic map unit
labels will plot on derivative map plots with appropriate stratigraphic
symbols if PLABL is used as the source for unit labels. The GeoAge
Font Group is accessed through geofont.txt. The GeoAGe Font
Group and relevant information are available via annonymous FTP:
Server: onyx.wr.usgs.gov
UserID: anonymous
Passwd: your email address
Directory: /pub/wpg/supplies/geoage/mac (for Macintosh fonts)
/pub/wpg/supplies/geoage/unix_and_nt (Unix and Windows fonts)
SHDPS polygon color from shadeset scamp2.shd (included in the
data package)
SHDFIL polygon fill pattern from shadeset geology2.shd
(included in the data package)
NAME geologic name of each unit
Geologic lines, which include features such as faults, and contacts are
attributed with the following set of feature attribute items contained in
chew_geo.aat. (A complete description of each line type is available in
the data table, lines.rel.)
CHEW_GEO.AAT:
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
1 FNODE# 4 5 B -
5 TNODE# 4 5 B -
9 LPOLY# 4 5 B -
13 RPOLY# 4 5 B -
17 LENGTH 4 12 F 3
21 CHEW_GEO# 4 5 B -
25 CHEW_GEO-ID 4 5 B -
29 L-TAG 25 25 C -
54 L-SYMB 3 3 I -
57 L-NAME 200 200 C -
L-TAG line attribute which consists of a character and numerical value,
e.g. C17, allows the user to relate the line entity to its corresponding
definition in lines.rel
List of line types used in the Chewelah geologic map coverage
(chew_geo), including abbreviated descriptions from lines.rel:
C17 Contact, landslide, location meets map accuracy standard
C29 Contact, sedimentary, location meets map accuracy standard
C31 Contact, sedimentary, inferred, location may not meet map
accuracy standard
C42 Contact, sedimentary, gradational, location may not meet map
accuracy standard
C49 Contact, igneous, location meets map accuracy standard
C51 Contact, igneous, inferred, location may not meet map
accuracy standard
C58 Contact, igneous, gradational, location may not meet map
accuracy standard
C67 Contact, metamorphic, inferred, location may not meet map
accuracy standard
C99 Contact, igneaous, scratch boundary
CL1 Cartographic line, map boundary
CL2 Cartographic line, water boundary
F1 Fault, high angle, slip unspecified, generic, location meets map
accuracy standard
F4 Fault, high angle, normal slip, location meets map accuracy
standard
F5 Fault, high angle, reverse slip, location meets map accuracy
standard
F7 Fault, high angle, slip unspecified, location meets map accuracy
standard
F10 Fault, high angle, normal slip, location may not meet map
accuracy standard
F11 Fault, high angle, reverse slip, location may not meet map
accuracy standard
F19 Fault, high angle, slip unspecified, inferred beneath mapped
covering unit, location may not meet map accuracy standard
F22 Fault, high angle, normal slip, inferred beneath mapped
covering unit, location may not meet map accuracy standard
F23 Fault, high angle, reverse slip, inferred beneath mapped
covering unit, location may not meet map accuracy standard
F40 Fault, high angle, normal slip, existence questionable, inferred
beneath mapped covering unit, location may not meet map
accuracy standard
F83 Fault, low angle, slip unspecified, younger over older, inferred,
location may not meet map accuracy standard
F84 Fault, low angle, slip unspecified, younger over older, inferred
beneath mapped covering unit, location may not meet map accuracy
standard
F113 Fault, low angle, normal slip, younger over older, detachment,
location meets map accuracy standard
F114 Fault, low angle, normal slip, younger over older, detachment,
location may not meet map accuracy standard
F116 Fault, low angle, normal slip, younger over older, detachment,
inferred beneath mapped covering unit, location may not meet
map accuracy standard
F87N Fault, low angle, slip unspecified, younger over older,
existence questionable, inferred beneath mapped covering unit,
location may not meet map accuracy standard
L-SYMB stores appropriate line symbol value from the lineset
geoscamp2.lin (included in the data package)
L-NAME formal name of fault
Geological point data includes site-specific information describing the
types and the orientation of bedding, foliation, and lineations. One
annotation subclass is included in the geologic points coverage,
CHEW_PTS: anno.dip displays the respective dip and plunge values
associated with individual point data.
Feature attribution and item definitions are as follows:
CHEW_PTS.PAT:
COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME
1 AREA 4 12 F 3
5 PERIMETER 4 12 F 3
9 CHEW_PTS# 4 5 B -
13 CHEW_PTS-ID 4 5 B -
17 P-SYMB 3 3 I -
20 P-TAG 25 25 C -
45 P-DIP 3 3 I -
48 P-STRIKE 3 3 I -
51 P-DIPDIR 3 3 I -
54 P-PLUNGE 3 3 I -
57 P-BEARING 3 3 I -
P-SYMB calls the point-type from the markerset geoscamp2.mrk
(included in the data package)
P-TAG point tag which consists of a character(s) and numerical
value, e.g. FN42, allows the user to relate the point entity to its
corresponding definition in the data table, points.rel
Point types (quantitative orientation data) in chew_pts.pat and their
corresponding, abbreviated descriptions from points.rel:
B1 Bedding, horizontal, sedimentary rocks
B2 Bedding, inclined, sedimentary rocks
B4 Bedding, vertical, sedimentary rocks
B6 Bedding, overturned, sedimentary rocks
B11 Bedding, wavy or crinkled, inclined, sedimentary rocks
B27 Bedding, inclined, volcanogenic rocks
FN13 Foliation, primary igneous, inclined
FN14 Foliation, primary igneous, vertical
FN42 Foliation, metamorphic, inclined
FN43 Foliation, metamorphic, vertical
CLV2 Cleavage, inclined
CLV4 Cleavage, vertical
L12 Lineation, crushed and streaked mineral grains, horizontal
L14 Lineation, crushed and streaked mineral grains, inclined
L37 Lineation, metamorphic, minor fold axis
P-DIP the dip of planar features
P-STRIKE the azimuth strike of planar features
P-DIPDIR azimuthal direction of dip
At present, it is not possible to indicate the cardinal direction of dip
using traditional conventions (traditional geologic notation allows a
quadrant designation following the dip value).
P-PLUNGE lineation plunge value
P-BEARING azimuthal bearing of plunge
The two coverages that provide base-map (DLG derived) geo-reference
information are CHEW_HYPS (topographic contour data) and CHEW_TRANS
(cultural data/roads). Both are line coverages.
In order to facilitate plotting of the topographic information available
in CHEW_HYPS, original DLG-derived attribution was retained and two
additional attributes added, LTYPE and ELEV. The added attributes allow
the user to descriminate between, and selectively plot, contour data.
Similarly, in addition to the original DLG-derived transportation
attribution available in CHEW_TRANS, three additional attributes were
added, LTYPE, USROUTE, and STROUTE. They permit the user to identify and
selectively plot the various road types included in the DLG data.
Cartographic line entities are contained in CHEW_XS (two cross-section
traces) and CHEW_LDR (unit label leaders). These line entities have only
one attribute, L-SYMB, and all have the same value, 1.
A complete description of the polygon, line, and point data coding schemes
is available in U.S. Geological Survey Open-File Reports OFR 97-859, OFR
97-860, and OFR 97-861 (full source citations follow):
Matti, J.C., Miller, F.K., Powell, R.E., Kennedy, S.A., Bunyapanasarn,
T.P., Koukladas, Catherine, Hauser, R.M., and Cossette, P.M., 1997b,
Geologic-point attributes for digital geologic-map databases produced by
the Southern California Areal Mapping Project (SCAMP), Version 1.0:
U.S.Geological Survey Open-File Report 97-859
Matti, J.C., Miller, F.K., Powell, R.E., Kennedy, S.A., and Cossette, P.M.,
1997c, Geologic-polygon attributes for digital geologic-map databases
produced by the Southern California Areal Mapping Project (SCAMP), Version
1.0: U.S.Geological Survey Open-File Report 97-860
Matti, J.C., Powell, R.E., Miller, F.K., Kennedy, S.A., Ruppert, K.R.,
Morton, G.L., and Cossette, P.M., 1997a, Geologic-line attributes for
digital geologic-map databases produced by the Southern California Areal
Mapping Project (SCAMP), Version 1.0: U.S.Geological Survey Open-File
Report 97-861