List of fossiliferous stratigraphic units in Oregon explained

This article contains a list of fossil-bearing stratigraphic units in the state of Oregon, U.S.

Lists of fossiliferous stratigraphic units

Cenozoic

Group	Formation	Period	Notes
			align=center	^[1]
			align=center	^[2]
			align=center	^[3] ^[4] ^[5]
			align=center	^[6]
			align=center	^[7] ^[8]
			align=center	^[9] ^[10] ^[11]
			align=center	^[12] ^[13]
			align=center	^[14] ^[15] ^[16]
			align=center	^[17]
			align=center	^[18] ^[19] ^[20]
			align=center	^[21]
			align=center	^[22]
			align=center	^[23] ^[24] ^[25]
			align=center	^[26]
		Late Eocene-Early Miocene (Duchesnean-Hemingfordian)	align=center	^[27] ^[28]
		Chattian-Burdigalian (Arikareean-Hemingfordian)	align=center	^[29]
			align=center	^[30] ^[31] ^[32]
			align=center	^[33]
			align=center	^[34] ^[35]
		Rupelian (Whitneyan)	align=center	^[36] ^[37]
			align=center	^[38] ^[39] ^[40]
			align=center	^[41] ^[42]
			align=center	^[43] ^[44] ^[45]
			align=center	^[46]
			align=center	^[47] ^[48]
			align=center	^[49]
			align=center	^[50]
			align=center	^[51]
			align=center	^[52] ^[53]
			align=center	^[54] ^[55]
			align=center	^[56] ^[57]
			align=center	^[58] ^[59]
			align=center	^[60] ^[61]
			align=center	^[62] ^[63]
			align=center	^[64] ^[65]
			align=center	^[66] ^[67]
			align=center	^[68] ^[69]
			align=center	^[70] ^[71]
			align=center	^[72] ^[73]
			align=center	^[74] ^[75]

Mesozoic

Group	Formation	Period	Notes
			align=center	^[76] ^[77]
			align=center	^[78] ^[79]
			align=center	^[80] ^[81]
			align=center	^[82] ^[83]
			align=center	^[84]
			align=center	^[85] ^[86]
			align=center	^[87] ^[88]
			align=center	^[89] ^[90]
			align=center	^[91] ^[92]
			align=center	^[93] ^[94]
			align=center	^[95] ^[96]
			align=center	^[97]
			align=center	^[98]
			align=center	^[99] ^[100]
			align=center	^[101] ^[102]
			align=center	^[103]
			align=center	^[104]
			align=center	^[105] ^[106]
			align=center	^[107]
			align=center	^[108]
			align=center	^[109] ^[110]
			align=center	^[111] ^[112]

Paleozoic

See also

• Paleontology in Oregon
• Lists of Oregon-related topics

Notes and References

1. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Elk%20River&group_formation_member=Elk%20River Elk River Formation
2. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Port%20Orford&group_formation_member=Port%20Orford Port Orford Formation
3. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Merced&group_formation_member=Merced Merced Formation
4. https://ngmdb.usgs.gov/Geolex/Units/Merced_13684.html Merced Formation
5. https://ngmdb.usgs.gov/Geolex/UnitRefs/MercedRefs_13684.html Merced Formation publications
6. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Empire&group_formation_member=Empire Empire Formation
7. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Alkali%20Canyon&group_formation_member=Alkali%20Canyon Alkali Canyon Formation
8. https://ngmdb.usgs.gov/Geolex/Units/AlkaliCanyon_4537.html Alkali Canyon Formation
9. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Chalk%20Butte&group_formation_member=Chalk%20Butte Chalk Butte Formation
10. https://ngmdb.usgs.gov/Geolex/Units/ChalkButte_4967.html Chalk Butte Formation
11. https://ngmdb.usgs.gov/Geolex/UnitRefs/ChalkButteRefs_4967.html Chalk Butte Formation publications
12. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Drewsey&group_formation_member=Drewsey Drewsey Formation
13. https://ngmdb.usgs.gov/Geolex/Units/Drewsey_15116.html Drewsey Formation
14. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=McKay&group_formation_member=McKay McKay Formation
15. https://ngmdb.usgs.gov/Geolex/Units/McKay_6017.html McKay Formation
16. https://ngmdb.usgs.gov/Geolex/UnitRefs/McKayRefs_6017.html McKay Formation publications
17. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Juntura&group_formation_member=Juntura Juntura Formation
18. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=The%20Dalles&group_formation_member=The%20Dalles The Dalles Formation
19. https://ngmdb.usgs.gov/Geolex/Units/Dalles_5133.html The Dalles Formation
20. https://ngmdb.usgs.gov/Geolex/UnitRefs/DallesRefs_5133.html The Dalles Formation publications
21. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Butte%20Creek&group_formation_member=Butte%20Creek Butte Creek Formation
22. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Deer%20Butte&group_formation_member=Deer%20Butte Deer Butte Formation
23. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Sucker%20Creek&group_formation_member=Sucker%20Creek Sucker Creek Formation
24. https://ngmdb.usgs.gov/Geolex/Units/SuccorCreek_12012.html Sucker Creek Formation
25. https://ngmdb.usgs.gov/Geolex/UnitRefs/SuccorCreekRefs_12012.html Sucker Creek Formation
26. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Mascall&group_formation_member=Mascall Mascall Formation
27. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=John%20Day&group_formation_member=John%20Day John Day Formation
28. https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=ORTsfj%3B0 John Day Formation
29. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Nye&group_formation_member=Nye Nye Formation
30. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=Astoria&group_formation_member=Astoria Astoria Group
31. https://ngmdb.usgs.gov/Geolex/Units/Astoria_4613.html Astoria Shale
32. https://ngmdb.usgs.gov/Geolex/Units/Astoria_16170.html Astoria
33. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Scotts%20Mills&group_formation_member=Scotts%20Mills Scotts Mills Formation
34. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Yaquina&group_formation_member=Yaquina Yaquina Formation
35. https://ngmdb.usgs.gov/Geolex/Units/Yaquina_14939.html Yaquina Formation
36. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Alsea&group_formation_member=Alsea Alsea Formation
37. https://ngmdb.usgs.gov/Geolex/Units/Alsea_4541.html Alsea Formation
38. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Fisher&group_formation_member=Fisher Fisher Formation
39. https://ngmdb.usgs.gov/Geolex/Units/Fisher_16389.html Fisher Formation
40. https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=ORTfe%3B0 Fisher & Eugene Formations
41. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Mehama&group_formation_member=Mehama Mehama Formation
42. https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=ORTu%3B0 Undifferentiated tuffaceous sedimentary rocks, tuffs, and basalt - Mehama Formation
43. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Pittsburg%20Bluff&group_formation_member=Pittsburg%20Bluff Pittsburg Bluff Formation
44. https://www.mindat.org/paleo_loc.php?id=35169 Pittsburg Bluff Formation
45. https://www.mindat.org/paleo_loc.php?id=27769 Pittsburg Bluff Formation
46. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Keasey&group_formation_member=Keasey Keasey Formation
47. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Eugene&group_formation_member=Eugene Eugene Formation
48. https://ngmdb.usgs.gov/Geolex/Units/Eugene_12863.html Eugene Formation
49. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Nestucca&group_formation_member=Nestucca Nestucca Formation
50. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Spencer&group_formation_member=Spencer Spencer Formation
51. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Coaledo&group_formation_member=Coaledo Coaledo Formation
52. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Cowlitz&group_formation_member=Cowlitz Cowlitz Formation
53. https://ngmdb.usgs.gov/Geolex/Units/Cowlitz_5098.html Cowlitz Formation
54. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Clarno&group_formation_member=Clarno Clarno Formation
55. https://ngmdb.usgs.gov/Geolex/Units/Clarno_5034.html Clarno Formation
56. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Tyee&group_formation_member=Tyee Tyee Formation
57. https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=ORTt%3B0 Tyee Formation
58. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=Umpqua&formation=Camas%20Valley&group_formation_member=Camas%20Valley Camas Valley Formation
59. https://ngmdb.usgs.gov/Geolex/Units/Umpqua_12176.html Umpqua Group
60. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=Umpqua&formation=Flournoy&group_formation_member=Flournoy Flournoy Formation
61. https://ngmdb.usgs.gov/Geolex/Units/Flournoy_5336.html Flournoy Formation
62. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Lookingglass&group_formation_member=Lookingglass Lookingglass Formation
63. https://ngmdb.usgs.gov/Geolex/Units/Lookingglass_5924.html Lookingglass Formation
64. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=Umpqua&formation=Roseburg&group_formation_member=Roseburg Roseburg Formation
65. https://ngmdb.usgs.gov/Geolex/Units/Roseburg_11720.html Roseburg Formation
66. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=White%20Tail%20Ridge&group_formation_member=White%20Tail%20Ridge White Tail Ridge Formation
67. https://www.mindat.org/paleo_collection.php?col=52274 White Tail Ridge Formation
68. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=Umpqua&formation=Tenmile&group_formation_member=Tenmile Tenmile Formation
69. https://ngmdb.usgs.gov/Geolex/Units/Tenmile_12072.html Tenmile Formation
70. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=Umpqua&formation=Bushnell%20Rock&group_formation_member=Bushnell%20Rock Bushnell Rock Formation
71. https://ngmdb.usgs.gov/Geolex/Units/BushnellRock_4858.html Bushnell Rock Formation
72. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Yamhill&group_formation_member=Yamhill Yamhill Formation
73. https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=ORTy%3B0 Yamhill Formation
74. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Siletz%20River%20Volcanics%20&group_formation_member=Siletz%20River%20Volcanics%20 Siletz River Volcanics
75. https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=ORTsr%3B0 Siletz River Volcanics
76. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Cape%20Sebastian%20Sandstone&group_formation_member=Cape%20Sebastian%20Sandstone Cape Sebastian Sandstone
77. https://ngmdb.usgs.gov/Geolex/Units/CapeSebastian_4918.html Cape Sebastian Sandstone
78. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Chico&group_formation_member=Chico Chico Formation
79. https://ngmdb.usgs.gov/Geolex/Units/Chico_16783.html Chico Formation
80. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Hudspeth&group_formation_member=Hudspeth Hudspeth Formation
81. https://ngmdb.usgs.gov/Geolex/Units/Hudspeth_5594.html Hudspeth Formation
82. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Days%20Creek&group_formation_member=Days%20Creek Days Creek Formation
83. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Day%20Creek%20&group_formation_member=Day%20Creek%20 Day Creek Formation
84. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Myrtle&group_formation_member=Myrtle Myrtle Formation
85. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=Myrtle&formation=Dotham&group_formation_member=Dotham Dotham Formation
86. https://ngmdb.usgs.gov/Geolex/Units/Dothan_16341.html Dothan Formation
87. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Otter%20Point&group_formation_member=Otter%20Point Otter Point Formation
88. https://ngmdb.usgs.gov/Geolex/Units/OtterPoint_11504.html Otter Point Formation
89. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Coon%20Hollow&group_formation_member=Coon%20Hollow Coon Hollow Formation
90. https://ngmdb.usgs.gov/Geolex/Units/CoonHollow_7695.html Coon Hollow Formation
91. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Lonesome&group_formation_member=Lonesome Lonesome Formation
92. https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=ORJs2%3B0 Lonesome Formation
93. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Weberg&group_formation_member=Weberg Weberg Formation
94. https://ngmdb.usgs.gov/Geolex/Units/Weberg_14835.html Weberg Member
95. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Snowshoe&group_formation_member=Snowshoe Snowshoe Formation
96. https://ngmdb.usgs.gov/Geolex/Units/Snowshoe_14518.html Snowshoe Formation
97. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Hyde&group_formation_member=Hyde Hyde Formation
98. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Nicely&group_formation_member=Nicely Nicely Formation
99. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=Mowich&formation=Robertson&group_formation_member=Robertson Robertson Formation
100. https://ngmdb.usgs.gov/Geolex/Units/Robertson_14300.html Robertson Formation
101. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Suplee&group_formation_member=Suplee Suplee Formation
102. https://ngmdb.usgs.gov/Geolex/Units/Mowich_13827.html Mowich Group
103. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Graylock&group_formation_member=Graylock Graylock Formation
104. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Hurwal&group_formation_member=Hurwal Hurwal Formation
105. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Martin%20Bridge&group_formation_member=Martin%20Bridge Martin Bridge Formation
106. https://ngmdb.usgs.gov/Geolex/Units/MartinBridge_8739.html Martin Bridge Formation
107. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Vester&group_formation_member=Vester Vester Formation
108. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Rail%20Cabin%20Argillite&group_formation_member=Rail%20Cabin%20Argillite Rail Cabin Argillite
109. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Brisbois&group_formation_member=Brisbois Brisbois Formation
110. https://ngmdb.usgs.gov/Geolex/Units/Brisbois_12428.html Brisbois Member
111. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=Aldrich%20Mountains&formation=Fields%20Creek&group_formation_member=Fields%20Creek Fields Creek Formation
112. https://ngmdb.usgs.gov/Geolex/Units/FieldsCreek_5321.html Fields Creek Formation
113. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Coyote%20Butte&group_formation_member=Coyote%20Butte Coyote Butte Formation
114. https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=ORTRPZs2%3B0 Coyote Butte Formation