Fault Activity Code:

1	BLUE-Possibly active during the Quaternary
2	**Extra category, not currently used
3	GREEN-Active during the Quaternary (<1.6 Ma)
4	YELLOW-Active during the middle to late Quaternary 
          (<0.78 Ma)
5	ORANGE-Active during the latest Quaternary (<120,000 
          yrs)
6	RED-Active during the Holocene (<10,000 yrs) or post 
          glacial (<18,000 yrs)

Notes and References:

1	Lineament across Quaternary unit from 1:100,000 
shaded relief DEM.

2	Sherrod, D. R., and Pickthorn, L. G., 1992, Geologic 
map of the west half of the Klamath Falls 1¡ by 2¡ 
Quadrangle, south-central Oregon:  U.S. Geological Survey 
Miscellaneous Investigations Series Map I-1282, scale 
1:250,000.

3	Bacon, C. R., Mastin, L. G., Scott, K. M., and 
Nathenson, M., 1997, Volcano and earthquake hazards in the 
Crater Lake region, Oregon:  U.S. Geological Survey Open-
File Report 97-487, 32 p., 1 sheet.

4	Klinger, R. E., Vetter U. R., and Ryter, D. W., 1996, 
Seismotectonic study for Gerber Dam, Klamath Project, 
California-Oregon:  U.S. Bureau of Reclamation 
Seismotectonic Report 96-1.

5	MacLeod, N. S., and Sherrod, D. R., 1992, 
Reconnaissance geologic map of the west half of the 
Crescent 1¡ by 2¡ Quadrangle, central Oregon:  U.S. 
Geological Survey Miscellaneous Investigations Series Map 
I-2215, 1 sheet, scale 1:250,000.

6	Hawkins, F. F., LaForge, R. C., and Gilbert, J. D., 
1989, Seismotectonic study for Wickiup and Crane Prairie 
Dams, Deschutes Project, Oregon: U.S. Bureau of Reclamation 
Seismotectonic Report 89-2.

7	Moring, B. C., 1983, Reconnaissance surficial 
geologic map of the Medford 1¡ by 2¡ Quadrangle, 
Oregon-California:  U.S. Geological Survey Miscellaneous 
Studies Map MF-1528, 2 sheets, scale 1:125,000.

8	Walker, G. W., and MacLeod, N. S., 1991, Geologic map 
of Oregon:  U.S. Geological Survey Special Geologic Map, 2 
sheets, scale 1:500,000.

9	Bacon, C. R., Lanphere, M. A., and Champion, D. E., 
1999, Late Quaternary slip rate and seismic hazards of the 
West Klamath Lake fault zone near Crater Lake, Oregon 
Cascades:  Geology, v. 27, p. 43-46.

10	Smith, J. G., 1988, Geologic map of the Pelican Butte 
Quadrangle, Klamath County, Oregon:  U.S. Geological Survey
Geologic Quadrangle Map GQ-1653, 1 sheet, scale 1:62,500.

11	Carver, G. A., 1972, Glacial geology of the Mountain 
Lakes Wilderness and adjacent parts of the Cascade Range, 
Oregon, Ph.D. Dissertation, University of Washington, 
Seattle, Washington, 75 p.

12	Ake, J. P., and Hawkins, F. F., 1999, Preliminary 
probabilistic ground motion evaluation, Crescent Lake Dam, 
Crescent Lake Project, Oregon:  U.S. Department of 
Interior Technical Memorandum No. D8330-99-023.

13	Pezzopane, S. K., 1993, Active faults and earthquake 
ground motions in Oregon, Ph.D. Dissertation, University 
of Oregon, Eugene, Oregon, 250 p.

14	Sherrod, D. R., 1991, Geologic map of a part of the 
Cascade Range between latitudes 43¡ - 44¡, central Oregon: 
U.S. Geological Survey Miscellaneous Investigations Series 
I-1891, 14 p., 1 sheet, scale 1:125,000.

15	Langridge, R. M., 1996, Unpublished map accompanying 
Langridge, R. M., Weldon, R. J., II, Pezzopane, S. K., and 
Jellinek, A. M., 1996, Active faulting and tufa formation:  A 
possible kinematic link between Albert Rim and Viewpoint 
Faults:  Geological Society of America Abstracts with 
Programs, v. 28, n. 5, p. 74.

16	Ryter, D. W., and Vetter, U. R., 1993, Seismotectonic 
Study for Haystack Dam, Deschutes Project, Oregon:  Bureau 
of Reclamation Seismotectonic Report 93-1.

17	Wong, I. G., Dober, M., Hemphill-Haley, M. A., 
Naugler, W., and Silva, W. J., 1999, On probabilistic 
seismic hazard analysis and safety evaluation; earthquake 
ground motions, Bully Creek Dam, Vale Project, eastern 
Oregon:  U.S. Department of Interior Technical 
Memorandum No. D8330-99-28.

18	Hawkins, F. F., Gilbert, J. D., and LaForge, R. C., 
1989, Seismotectonic Study for Warm-Springs Dam - Vale 
Project and Owyhee Dam - Owyhee Project, Oregon:  Bureau of 
Reclamation Seismotectonic Report 89-6.

19	Hawkins, F. F., LaForge, R. C., Templeton, M., and 
Gilbert, J. D., 1988, Seismotectonic study for Arthur R. 
Bowman and Ochoco Dams, Crooked River Project, Oregon:  
Bureau of Reclamation Seismotectonic Report 88-10.

20	Narwold, C. F., 1999, Late Quaternary faulting in 
the Quinn River Fault Zone, a soils investigation:  Friends 
of the Pleistocene Field Trip Guide, Pacific Cell.

21	Mimura, K., 1992, Reconnaissance geologic map of the 
west half of the Bend and the east half of the Shelvin Park 
7.5' Quadrangles, Deschutes County, Oregon:  U.S. Geological 
Survey Miscellaneous Field Studies Map MF-2189, 1 sheet,
scale 1:24,000.

22	Taylor, E. M., 1981, Central High Cascade roadside 
geology, in Johnston, D. A., and Donnelly-Nolan, J., eds., 
Guides to Some Volcanic Terrains in Washington, Idaho, 
Oregon, and Northern California:  U.S. Geological Survey 
Circular 838, p. 55-83.

23	Hemphill-Haley, M. A., 1995, Unpublished data.

24	Hemphill-Haley, M. A., Page, W. D., Burke, R., and 
Carver, G. A., 1989, Holocene activity of the Alvord fault, 
Steens Mountain, southeastern Oregon:  Final Report to the 
U.S. Geological Survey under Grant No. 14-08-0001-61333, 45 
p.

25	Hemphill-Haley, M. A., 1987, Quaternary stratigraphy 
and late Holocene faulting along the base of the eastern 
escarpment of Steens Mountain, southeastern Oregon, M.A. 
thesis, Humboldt State University, Arcata, California, 87 
p.

26	Lindberg, D. N., 1999, A synopsis of late Pleistocene 
shorelines and faulting, Tule Springs Rims to Mickey Basin, 
Alvord Desert, Harney County, Oregon.

27	Weldon, E. M., Unpublished air photo mapping of the 
Hot Springs fault, Summer Lake Basin.

28	Simpson, G. D., Hemphill-Haley, M. A., Wong, I. G., 
Bott, J. D., Silva, W. J., and Lettis, W.R., 1993, 
Seismotectonic evaluation, Burnt River Project-Unity Dam 
and Baker Project-Thief Valley Dam, northwestern Oregon:  
Final Report, prepared for U.S. Bureau of Reclamation.

29	Mann, G. M., and Meyer, G. E., 1993, Late Cenozoic 
structure and correlations to seismicity along the Olympic-
Wallowa lineament, northwest United States:  Geological 
Society of America Bulletin, v. 105, p. 853-871.

30	Vetter, U. R., 1998, Preliminary seismic hazard 
evaluation Mason Dam, Baker Project, Oregon, Technical 
Memorandum No. D8330-98-015, prepared for the U.S. Bureau 
of Reclamation, Denver, Colorado.

31	Wong, I. G., Dober, M., Hemphill-Haley, M.A., 
Naugler, W., and Silva, W. J., 1999, On probabilistic 
seismic hazard analysis and safety evaluation; earthquake 
ground motions, Bully Creek Dam, Vale Project, eastern 
Oregon:  U.S. Department of Interior Technical 
Memorandum No. D8330-99-28.

32	Piety, L. A., LaForge, R. C., and Foley, L. L., 1990, 
Seismotectonic study for Cold Springs and McKay Dams, 
Umatilla Project, Oregon:  Seismotectonic Report 90-1, 
prepared for U.S. Bureau of Reclamation, Denver, Colorado.

33	Geomatrix Consultants, 1990, Seismotectionic 
evaluation, Waco Dam site:  Final Report, prepared for U.S. 
Bureau of Reclamation, 115 p.

34	Minor, S. A., 1986, Stratigraphy and structure of the 
Western Trout Creek and Northern Bilk Creek Mountains, 
Harney County, Oregon and Humboldt County, Nevada, M.S. 
thesis, University of Colorado, Boulder, Colorado.

35	Walker, G. W., 1973, Reconnaissance geologic map of 
the Pendleton Quadrangle, Oregon and Washington:  U.S.
Geological Survey Miscellaneous Investigation Map I-727,
1 sheet, scale 1:250,000.

36	Walker, G. W., Peterson, N. V., and Greene, R. C., 1967, 
Reconnaissance geologic map of the east half of the Crescent 
Quadrangle, Lake, Deschutes, and Crook Counties, Oregon:  
U.S. Geological Survey Miscellaneous Series Map I-493,
1 sheet, scale 1:250,000.

37	Weldon, R. J., II, Unpublished mapping.

38	Geomatrix Consultants, 1995, Seismic design mapping, 
State of Oregon:  Final Report, prepared for Oregon 
Department of Transportation, 252 p. 

39	Swanson, D. A., 1969, Reconnaissance geologic map of 
the east half of the Bend quadrangle, Crook, Wheeler, 
Jefferson, Wasco, and Deschutes Counties, Oregon:  U.S. 
Geological Survey Miscellaneous Geologic Investigations Map 
I-568, scale 1:250,000.

40 Faults digitized from reference #36 that cut or bound
Quaternary units.

41	Faults digitized from reference #36 that do not cut or 
bound Quaternary units, but are kinematically related to 
other active faults.

42	Faults drawn from DEM that do not cut or bound 
Quaternary units, but are kinematically related to other 
active faults.

43	Faults taken from digital Oregon State geologic map 
(digital version of reference #8) that bound or cut Quaternary 
units (little effort was made to check or redraw these faults).

44	Faults with numbered references on Personius, S. F., 
Dart, R. L., Bradley, Lee-Ann, and Haller, K. M., 2003, 
Map and data for Quaternary faults and folds in Oregon:  
U.S. Geological Survey Open-File Report 03-095, 579 p., 1 
sheet, scale 1:750,000 [numbered references are in our 
fault attribute table].

45	Faults digitized from the Oregon State map (reference #8)
that cut a Quaternary (or possibly Quaternary) unit.

46	Faults digitized from the Oregon State map (reference #8) 
that bound a Quaternary (or possibly Quaternary) unit.

47	Clear continuation of a recognized active (or possibly 
active) fault.

48	Clearly part of a recognized active (or possibly 
active) fault zone.

49	May cut a Quaternary unit and appears to deflect a 
river course.

50	Has obvious geomorphic expression, but encounters no 
Quaternary units.

51	Has obvious geomorphic expression and kinematic 
relationship to other faults inferred to be active.

52	Possible buried fault, defined by aligned volcanic 
vents.

53	Same as reference #51, but trace taken from reference #8.


Geology Units

	Walker, G. W., and MacLeod, N. S., 1991, Geologic map 
of Oregon:  U.S. Geological Survey Special Geologic Map, 2 
sheets, scale 1:500,000. (digital version)


Vents

	Luedke, R. G., and Smith R. L., 1982, Map showing 
distribution, composition, and age of late Cenozoic volcanic 
centers in Oregon and Washington:  U.S. Geological Survey 
Miscellaneous Investigations Series Map I-1091-D, 1 sheet, 
scale 1:1,000,000.

	Luedke, R. G., Smith R. L., and Russell-Robinson, S. L.,
1983, Map showing distribution, composition, and age of late
Cenozoic volcanoes and volcanic rocks of the Cascade Range
and vicinity, northwestern United States:  Geological Survey
Miscellaneous Investigations Series Map I-1507, 1 sheet,
scale 1:500,000.