Open-File Report 03-105
Title:
How should this data set be cited?
Wilson, Frederic H., Hudson, Travis L., Grybeck, Donald, Stoeser, Douglas B., Preller, Cindi C., Bickerstaff, Damon, Labay, Keith, and Miller, Marti L., 2003, Preliminary geologic map of the northeast Dillingham quadrangle (D-1, D-2, C-1, C-2): U.S. Geological Survey Open-File Report OFR 03-105.
Online Links:
What geographic area does the data set cover?
West_Bounding_Coordinate: -156.75
East_Bounding_Coordinate: -156.0
North_Bounding_Coordinate: 60.0
South_Bounding_Coordinate: 59.5
XXX (PS and PDF)
Postscript file showing the geologic map having a topographic and land-grid base, also includes a Correlation of Map Units diagram and a List of Map Units.
Does the data set describe conditions during a particular time period?
Calendar_Date: 2003
Currentness_Reference: publication date
What is the general form of this data set?
How does the data set represent geographic features?
How are geographic features stored in the data set?
This is a Vector data set.
What coordinate system is used to represent geographic features?
Grid_Coordinate_System_Name: Universal Transverse Mercator
Universal_Transverse_Mercator:
UTM_Zone_Number: 4
Transverse_Mercator:
Scale_Factor_at_Central_Meridian: 0.9996
Longitude_of_Central_Meridian: -159.0
Latitude_of_Projection_Origin: 0.0
False_Easting: 0.0
False_Northing: 0.0
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest 50
Ordinates (y-coordinates) are specified to the nearest 50
Planar coordinates are specified in meters
How does the data set describe geographic features?
polygons
Characteristics of the polygon features in the geology coverage, dinegeol, are coded in the polygon attribute table. Table dinegeol.pat includes the following items: CLASS, NSACLASS, NSAMOD ('HFS' = hornfels), LABEL (geologic unit label), and SOURCE. (Source: authors)
CLASS
CLASS is a positive integer value (4 5 B) item in the polygon attribute table. Values range from 99 to 6002. See USGS publication, USGS OFR03-105, for full descriptions of the geologic units. (Source: USGS OFR03-105)
| Value | Definition |
|---|---|
| 99 | bu - possible bedrock of unknown character |
| 102 | water |
| 5011 | Tvf - Felsic hypabyssal rocks (Tertiary) |
| 5081 | Tmv - Volcanic rocks, undivided, basalt and andesite (Tertiary, Eocene and older?) |
| 5100 | Qs - Undifferentiated surficial deposits (Quaternary) |
| 5105 | Qa - Alluvium (Quaternary) |
| 5106 | Qaf - Alluvial fan deposits (Quaternary) |
| 5107 | Qc - Colluvial deposits (Quaternary) |
| 5108 | Qls - Landslide deposits (Quaternary) |
| 5110 | Qt - Terrace deposits (Quaternary) |
| 5111 | Qac - Abandoned channel deposits (Quaternary) |
| 5112 | Ql - Lacustrine deposits (Quaternary) |
| 5113 | Qsw - Swamp deposits (Quaternary) |
| 5120 | Qd - Eolian sand (Quaternary) |
| 5125 | Qm - Glacial deposits (Quaternary) |
| 5128 | Qsf - Solifluction deposits (Quaternary) |
| 5129 | Qme - Esker deposits (Quaternary) |
| 5135 | Qmbu - Undifferentiated glacial deposits of the Brooks Lake glaciation (Quaternary) |
| 5139 | Qmbk - Brooks Lake, Kvichak moraine (Quaternary) |
| 5140 | Qmbo - Outwash deposits of the Brooks Lake glaciation (Quaternary) |
| 5166 | TKgs - Granitic rocks of the eastern Stuyahok Hills (Tertiary and Cretaceous) |
| 5167 | TKpsw - Plutons of the Pike Creek area, southwestern unit (Tertiary and Cretaceous) |
| 5168 | TKga - Alaskite (Tertiary and Cretaceous) |
| 5169 | TKpe - Plutons of the Pike Creek area, eastern unit (Tertiary and Cretaceous) |
| 5170 | TKgm - Granitic rocks and mixed hornfels and dikes (Tertiary and Cretaceous) |
| 5171 | TKgnw - Northwest pluton (Tertiary and Cretaceous) |
| 5172 | TKgn - Northern pluton (Tertiary and Cretaceous) |
| 5173 | TKpnw - Plutons of the Pike Creek area, northwestern unit (Tertiary and Cretaceous) |
| 5174 | TKge - Eastern granitic rocks (Tertiary and Cretaceous) |
| 5190 | Qmm - Glacial deposits of the Mak Hill glaciation (Quaternary) |
| 5194 | Qmmg - Ground moraine of the Mak Hill glaciation (Quaternary) |
| 5195 | Qmmo - Outwash deposits of the Mak Hill glaciation (Quaternary) |
| 5200 | Qmu - Glacial deposits of an unnamed glaciation of Platt and Muller (1957?) (Quaternary) |
| 5230 | KJvm - Olivine basalt flows and fragmental mafic volcanic rocks (Cretaceous or Jurassic?) |
| 5312 | Jkw - Graywacke and conglomerate (Middle to Late Jurassic(?)) |
| 5400 | Tvu - Volcanic rocks, undivided (Tertiary) |
| 5401 | Tbr - Rhyolitic and dacite tuff (Tertiary, Eocence and older?) |
| 5403 | Tva - Andesite plug (Tertiary) |
| 5404 | Tbb - Olivine basalt (Tertiary, Eocene and older?) |
| 5405 | Tob - Older olivine basalt (Tertiary, Eocene and older?) |
| 5410 | Qt2 - Older terrace deposits (Quaternary) |
| 5500 | Trv - Mafic igneous rocks (Triassic(?)) |
| 5615 | Ttv - Tuffaceous felsic volcanic rocks (Tertiary, Eocene and older?) |
| 5665 | TKpd - Plutons of the Pike Creek area, monzodioritic rocks of Pike Creek (Tertiary and Cretaceous) |
| 5666 | TKqd - Monzonitic rocks (Tertiary and Cretaceous) |
| 5872 | KJvs - Volcanic and sedimentary rocks (Early Cretaceous(?) to Middle Jurassic(?)) |
| 5970 | Kk - Kuskokwim Group (Cretaceous) |
| 6002 | Tig - Ignimbrite (Tertiary, Paleocene) |
| Value | Definition |
|---|---|
| 99 | equivalant to CLASS = 99 bu - possible bedrock of unknown character |
| 102 | equivalent to CLASS = 102 water |
| 1011 | equivalent to CLASS = 5011 Tvf - Felsic hypabyssal rocks (Tertiary) |
| 1081 | equivalent to CLASS = 5081 Tmv - Volcanic rocks, undivided, basalt and andesite (Tertiary, Eocene and older?) |
| 100 | equivalent to CLASS = 5100 Qs - Undifferentiated surficial deposits (Quaternary) |
| 105 | equivalent to CLASS = 5105 Qa - Alluvium (Quaternary) |
| 106 | equivalent to CLASS = 5106 Qaf - Alluvial fan deposits (Quaternary) |
| 107 | equivalent to CLASS = 5107 Qc - Colluvial deposits (Quaternary) |
| 108 | equivalent to CLASS = 5108 Qls - Landslide deposits (Quaternary) |
| 110 | equivalent to CLASS = 5110 Qt - Terrace deposits (Quaternary) |
| 111 | equivalent to CLASS = 5111 Qac - Abandoned channel deposits (Quaternary) |
| 112 | equivalent to CLASS = 5112 Ql - Lacustrine deposits (Quaternary) |
| 113 | equivalent to CLASS = 5113 Qsw - Swamp deposits (Quaternary) |
| 120 | equivalent to CLASS = 5120 Qd - Eolian sand (Quaternary) |
| 125 | equivalent to CLASS = 5125 Qm - Glacial deposits (Quaternary) |
| 128 | equivalent to CLASS = 5128 Qsf - Solifluction deposits (Quaternary) |
| 129 | equivalent to CLASS = 5129 Qme - Esker deposits (Quaternary) |
| 135 | equivalent to CLASS = 5135 Qmbu - Undifferentiated glacial deposits of the Brooks Lake glaciation (Quaternary) |
| 139 | equivalent to CLASS = 5139 Qmbk - Brooks Lake, Kvichak moraine (Quaternary) |
| 140 | equivalent to CLASS = 5140 Qmbo - Outwash deposits of the Brooks Lake glaciation (Quaternary) |
| 1655 | consists of CLASS = 5166, 5167, 5168, 5169, 5170, 5171, 5172, 5173, and 5174. felsic plutons |
| 190 | equivalent to CLASS = 5190 Qmm - Glacial deposits of the Mak Hill glaciation (Quaternary) |
| 194 | equivalent to CLASS = 5194 Qmmg - Ground moraine of the Mak Hill glaciation (Quaternary) |
| 195 | equivalent to CLASS = 5195 Qmmo - Outwash deposits of the Mak Hill glaciation (Quaternary) |
| 200 | equivalent to CLASS = 5200 Qmu - Glacial deposits of an unnamed glaciation of Platt and Muller (1957?) (Quaternary) |
| 2870 | equivalent to CLASS = 5230 KJvm - Olivine basalt flows and fragmental mafic volcanic rocks (Cretaceous or Jurassic?) |
| 3150 | equivalent to CLASS = 5312 Jkw - Graywacke and conglomerate (Middle to Late Jurassic(?)) |
| 1000 | equivalent to CLASS = 5400 Tvu - Volcanic rocks, undivided (Tertiary) |
| 1001 | equivalent to CLASS = 5401 Tbr - Rhyolitic and dacite tuff (Tertiary, Eocence and older?) |
| 1003 | equivalent to CLASS = 5403 Tva - Andesite plug (Tertiary) |
| 1111 | equivalent to CLASS = 5404 Tbb - Olivine basalt (Tertiary, Eocene and older?) |
| 1125 | equivalent to CLASS = 5405 Tob - Older olivine basalt (Tertiary, Eocene and older?) |
| 110 | equivalent to CLASS = 5410 Qt2 - Older terrace deposits (Quaternary) |
| 4425 | equivalent to CLASS = 5500 Trv - Mafic igneous rocks (Triassic(?)) |
| 1070 | equivalent to CLASS = 5615 Ttv - Tuffaceous felsic volcanic rocks (Tertiary, Eocene and older?) |
| 1665 | consists of CLASS = 5665 and 5666 intermediate plutons |
| 2872 | equivalent to CLASS = 5872 KJvs - Volcanic and sedimentary rocks (Early Cretaceous(?) to Middle Jurassic(?)) |
| 1970 | equivalent to CLASS = 5970 Kk - Kuskokwim Group (Cretaceous) |
| 1130 | equivalent to CLASS = 6002 Tig - Ignimbrite (Tertiary, Paleocene) |
| Value | Definition |
|---|---|
| DI001 | Paper or digital USGS topographic map |
| DI005 | Original mapping; source is this publication |
Characteristics of the arc features in the geology coverage, dinegeol, are coded in dinegeol.aat, the arc attribute table. The .aat consists of the following items: ARC-CODE, LINETYPE, and SOURCE. These items are present but not used: ARC-PARA1, ARC-PARA2. (Source: This data set)
ARC-CODE
ARC-CODE is a positive integer value (3 3 i) item in the arc attribute table. Values range from 2 to 99. ARC-CODE defines the stratigraphic boundary, fault, or other linear feature. The numeric code is described by the item LINETYPE. (Source: This data set)
| Value | Definition |
|---|---|
| 2 | stratigraphic contact, location approximate |
| 3 | stratigraphic contact, location inferred |
| 4 | fault, location certain |
| 5 | fault, location approximate |
| 7 | shoreline |
| 19 | internal contact, glacial front, right side from origin points up glacier |
| 52 | concealed fault |
| 93 | linear feature mapped from air photos |
| 99 | bounding line of coverage |
| Value | Definition |
|---|---|
| DI001 | Paper or digital USGS topographic map |
| DI005 | Original mapping; source is this publication |
Information on radiometric dating samples is stored in the point coverage, datesdat. The point attribute table, datesdat.pat, includes the following items: SAMPLE (sample field id number), UNIT (geologic unit), ROCK (rock type), LAT (latitude), LONG (longitude), METHOD (dating method), MINERAL (mineral dated), TYPE (type of age calculation), AGE (age in millions of years), ERROR (analytical error in millions of years), and MAPNO (map number). (Source: authors)
SAMPLE
SAMPLE is a character (12 12 C) field in the point attribute table, datesdat.pat. (Source: none)
Field station identification numbers
UNIT
UNIT is a character (6 8 C) field in the point attribute table, datesdat.pat. (Source: none)
Label of the geologic unit from which the sample was taken.
ROCK
ROCK is a character (20 22 C) field in the point attribute table, datesdat.pat, and identifies the type of rock the dating sample is from. (Source: none)
Rock from which dating sample is from
LAT
LAT is a numeric field (8 10 F) in the point attribute table, datesdat.pat. LAT is the latitude in decimal degrees and has values ranging from 0 to 61.0140. (Source: none)
Latitude in decimal degrees. Locations with latitude value = 0 were obtained in township and range, a Public Land Survey system, and the description of the location is not detailed enough to give an accurate latitude.
LONG
LONG is a numeric field (8 10 F) in the point attribute table, datesdat.pat. LONG is the longitude in decimal degrees and has values ranging from 0 to 158.3010. (Source: none)
Longitude in decimal degrees. Locations with longitude value = 0 were obtained in township and range, a Public Land Survey system, and the description of the location is not detailed enough to give an accurate longtitude.
METHOD
METHOD describes the dating method used (Source: none)
Ar-Ar = 40Ar-39Ar K-Ar = conventional K-Ar dating
MINERAL
MINERAL is a character field (12 14 C) and lists the mineral or phase dated (Source: none)
Biotite Hornblende K-feldspar = potassium feldspar Plagioclase WR-matrix = whole rock matrix White mica
TYPE
TYPE is a character field (10 12 C) in the point attribute table, datesdat.pat. TYPE describes how the age was calculated. (Source: none)
Average Isochron Plateau Total fusn = total fusion
AGE
AGE is a numeric field (8 10 F) in the point attribute table, datesdat.pat. AGE values range from 41.69 to 84.49 with units in millions of years. (Source: none)
AGE is the calculated radiometric age, given in millions of years
ERROR
ERROR is a numeric field (8 10 F) in the point attribute table, datesdat.pat. ERROR values range from 0.03 to 1.93. Units are millions of years. (Source: none)
ERROR is the analytical error, given in millions of years, for the calculated radiometric age.
MAPNO
MAPNO is a numeric field (4 5 B) in the point attribute table, datesdat.pat. MAPNO values range from 0 to 35. (Source: none)
MAPNO was created to help identify sample locations with sample data listed on Table 1. Radiometric ages in the pamphlet.
The geology coverage, dinegeol, was created by F.H. Wilson. The radiometric age sample location coverage, datesdat, was created by F.H. Wilson.
Alaska Science Center
c/o Frederic H. Wilson
Geologist
4200 University Drive
Anchorage, AK 99508
USA
907-786-7448 (voice)
fwilson@usgs.gov
Digital representation of geologic mapping facilitates the presentation and analysis of earth-science data. Digital maps may be displayed at any scale or projection, however the geologic data in this coverage is not intended for use at a scale larger than 1:100,000.
Linework was captured by hand digitizing hand-drawn geology from paper 1:63,360 scale topographic map base. Vector and polygon attributes were obtained from compilation field maps and other sources. Surficial deposits and linear features were mapped from air photos on the topographic base. The digital data has been checked and the geologic map has undergone technical review.
The locations of the radiometric age samples were obtained by digitizing field station location on field maps or using GPS locations obtained during field work.
Users of this digital data set should respect the intentions of the original mappers and the limitations of a thematic map. This geologic map compilation is intended to be used at a scale of 1:100,000; it is not intended to be used at a significantly more detailed scale.
These coverages were used to create the map portion of the northeast Dillingham quadrangle. Text files, tables, graphics, and topography shown on the map sheet or pamphlet are not included in this data set.
The geology coverage, dinegeol, is a network coverage containing arcs and polygons. Each polygon has a coded attribute designating the mapped geologic unit. Faults, stratigraphic contacts, and other linear features are represented as arcs. When a fault is also a stratigraphic contact, only a single arc is present. Dangling arcs may be present (faults, linears, etc.)
Coverage datesdat is a point coverage showing the locations of radiometric age samples. Points have attributes which briefly describe the sample, dating method, and age.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- Use_Constraints: None
USGS Information Services
Box 25286
Denver Federal Center
Denver, CO 80225-0046
USA
303-202-4200 or 1-888-ASK-USGS (voice)
USGS OFR 03-105
Although this data has been used by the USGS, no warranty, expressed or implied, is made by the USGS as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data, software, or related materials.
U.S. Geological Survey
c/o Nora B. Shew
4200 University Drive
Anchorage, AK 99508
USA
907-786-7445 (voice)
nshew@usgs.gov
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://pubsdata.usgs.gov/pubs/of/2003/0105/dinegeol_meta.faq.html
Page Contact Information: GS Pubs Web Contact
Page Last Modified: Wednesday, 02-Apr-2014 12:14:53 EDT
