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Fig. 3 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 3. Stratigraphic nomenclature applied in previous studies to Oligocene and early Miocene rocks of the John Day Formation in the eastern subregion. The ignimbrite of Hay (1963) occurs within the Turtle Cove Member of Fisher and Rensberger (1972), who recognized its importance as a regional marker unit within the John Day Formation.
Fig. 7 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 7. The valley of Balm Creek (in foreground), looking north, with the Beardog Section (center of photograph) exposed along the east valley wall of a small tributary trending northwest from Balm Creek. This locality is in the W½, SW¼, T8S, R25E, Kimberly 7.5minute quadrangle. a, Picture Gorge Group Basalt; b, Rose Creek Member; c, Balm Creek Member; d, GMAT marker tuff; e, Haystack Valley Member (revised).
Fig. 10 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 10. Continued. The Rose Creek Member is characterized by a lithofacies association comprising polymictic welded tuffbearing conglomerate fining upward to grayblack coarse detrital fluvial sandstone, debris flows, coarse obsidianshard tuff, and olivegray tuffaceous siltstone and claystone, overprinted by siliceous paleosols.
Fig. 16 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 16. The Johnson Canyon Member exposed along the north wall of Johnson Canyon southwest of Kimberly. The contact (c) between the lower and upper units of the member separates tuffaceous sediments with calcareous paleosols in the lower unit from tuffs overprinted by siliceous paleosols in the upper unit. Monomictic vitric tuffpebble conglomerates (m) are restricted to the lower unit. PG, Picture Gorge Basalt Subgroup.
Fig. 2 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 2. Map of the John Day River valley with geographic localities discussed in this report. Our field study of upper John Day rocks was focused in the Haystack CreekBalm Creek area in Haystack Valley east of the town of Spray; in the vicinity of Kimberly post office and for ~20 mi to the south of Kimberly along the John Day valley; and at Sutton Mountain east of Bridge Creek. The geographic area within the circle includes the classic John Day exposures studied by Merriam (1901), Hay (1963), and Fisher and Rensberger (1972).
Fig. 6 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 6. Uppermost part of the Beardog Section: a basal fluvial channel of the Rose Creek Member is incised ~50 ft into the Balm Creek Member. Debris flow and finely laminated lacustrine tuffs comprise much of the channel fill overprinted by numerous siliceous paleosols. The Rose Creek Member was not identified by Fisher and Rensberger (1972: section 10) whose measured section terminated below this stratigraphic level.
Fig. 21 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 21. Schematic crosssection of the John Day basin from Middle Mountain to ~3 mi south of the Blue Mountains uplift (based on Fisher, 1967: fig. 5). Note the thick upper John Day strata (i.e., above Tji) near the center of the transect in the vicinity of Kimberly (Kimberly, Johnson Canyon, and Rose Creek Members), and to the north of the Richmond fault in the Balm Creek syncline (Haystack Valley Member [revised], Balm Creek and Rose Creek Members). Length of crosssection: ~25 mi (~40 km). Abbreviations: Tj, John Day Formation; Tji, Picture Gorge ignimbrite; Tc, Clarno Formation; pT, preTertiary rocks; PGBS, Picture Gorge Basalt Subgroup.
Fig. 14 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 14. West wall of the John Day valley south of Kimberly at Dead Cow Gulch. The Rose Creek Member (a) caps the Dead Cow Gulch measured section (fig. 13) south of the Dead Cow Gulch fault (c); the V6668 section (b) occurs north of the fault. The fault follows a westtoeast trend along the gulch; flows of the Picture Gorge Basalt (d) abut the fault plane.
Fig. 24 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 24. Stratigraphic nomenclature applied to the John Day Formation south of Kimberly, Oregon: a, Fisher and Rensberger (1972); b–d, this report. Abbreviations: tc, Turtle Cove Member; k, Kimberly Member; jc, Johnson Canyon Member; rc, Rose Creek Member.
Fig. 1 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 1. The principal exposures of the John Day Formation of northcentral Oregon occur along the course of the John Day River (eastern facies), Crooked River (southern facies), and Deschutes River (western facies). The eastern and southern facies have produced abundant fossil mammals that form the basis for an Oligocene and early Miocene mammalian biochronology in the Pacific Northwest. This report examines the upper John Day Formation of the eastern facies, outcropping along the John Day River, geographically situated between the Blue Mountain anticlinal uplift and the OchocoAldrich Mountains axis.
Fig. 10 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 10. Stratigraphic profile of the east wall of the John Day valley south of Kimberly from Rose Creek south to McCarty Creek (Foree South). The Rose Creek Member rests with angular unconformity on older John Day rocks (Turtle Cove and Kimberly Members). The early Hemingfordian mammal fauna from the Rose Creek Member comes primarily from Picture Gorge 36 and sites at Rose Creek.
Fig. 23 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 23. Stratigraphic nomenclature applied to the upper John Day Formation in the Balm Creek syncline east of Haystack Valley: a, Fisher and Rensberger's section 10 (equates to the Asher Section of this report); b, upper John Day strata of the Balm Creek syncline as interpreted in this study. 1 Later assigned by Rensberger (1983) to the Haystack Valley Member.
Fig. 4 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 4. Stratigraphic profile of the upper John Day Formation from the mouth of Haystack Creek 1 mi (1.65 km) eastward to the Balm Creek drainage. Four measured sections are correlated using a gray massive airfall tuff (GMAT) and local monomictic weldedtuff conglomerate bodies (see p. 17 for lithologic key). Rocks below the GMAT marker bed are particularly fossiliferous and are the source of the mammal fauna from the Haystack Valley Member (revised). Entoptychine rodents occur no higher in the revised member than the 40–50ft level of the Asher Section (lower part). Unit thicknesses in lowermost 160 ft are estimated within ±5%.
Fig. 9 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 9. Stratigraphic profile of the east wall of the John Day valley south of Kimberly from Spring Creek to Rose Creek. Downfaulting of the Rose Creek Member along the Rose Creek fault and at faults in the vicinity of Spring Creek results in offset of>300 ft (from ~2735 to ~2400 ft) over a distance of 1 mi (1.6 km). The profile continues to the south in figure 10.
Fig. 22 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 22. Schematic diagram showing the hypothetical development (A–F) of an early Miocene halfgraben or graben system in the vicinity of and south of Kimberly post office, John Day valley, Oregon. Abbreviations: k, Kimberly Member; jc, Johnson Canyon Member; rc, Rose Creek Member; twb, Twickenham Basalt; DCGF, Dead Cow Gulch fault; RCF, Rose Creek fault.
Map B in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Map B: Topographic map of the Kimberly area, John Day valley, Oregon, Kimberly 7.5minute quadrangle, indicating the location of measured sections in Johnson Canyon: 19, Johnson Canyon East; 20, Johnson Canyon West.
Fig. 12 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 12. Debris flows characterize Rose Creek Member outcrops along the east wall of the John Day valley south of Kimberly, at Sutton Mountain, and at Balm Creek. Rounded clasts of welded tuff derived from the Picture Gorge ignimbrite, vitric tuff from subjacent John Day units, and clasts of Deep Creek tuff, are supported in a finegrained tuffaceous matrix. Masses of watersaturated volcanic ash moved downslope into stream courses where fluvial gravels were incorporated and deposited as local debris lenses.
Fig. 11 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 11. The Rose Creek Member at the early Hemingfordian mammal locality Picture Gorge 36. Coarse polymictic gravels, sands, and overlying tuffaceous sediments of the Rose Creek Member (rc) incise the Kimberly Member gray tuffs (k). Dashed white line marks the contact between the two units.
Fig. 18 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 18. The Great Plains oreodont Merycochoerus from the Childs Frick collection of the American Museum of Natural History provides biochronologic control for the occurrence of this indicator taxon in the upper John Day Formation, Oregon. Because many upper John Day taxa are represented by few individuals, the larger Frick samples of Arikareean/Hemingfordian mammals are critical to accurate age assessment. The graph measures the progressive fusion and posterior extension of the premaxillae in time, most likely related to ongoing development of a tapirlike proboscis in this large oreodont. The triangle labelled ''Rose Creek'' refers to UCMP 76848 from Picture Gorge 36.
Fig. 17 in Geology And Paleontology Of The Upper John Day Beds, John River Valley, Oregon: Lithostratigraphic And Biochronologic Revision In The Haystack Valley And Kimberly Areas (Kimberly And Mt. Misery Quadrangles)
Fig. 17. Uppermost rock units of the John Day Formation at Sutton Mountain, Wheeler Co., Oregon. These exposures along the southern face of Sutton Mountain demonstrate the superposition of the Rose Creek Member on the Johnson Canyon Member (''Unit D'') in the N½, sec. 33, T10S, R21E, Sutton Mountain 7.5 min. quadrangle, in an area where Hay (1963: figs. 2, 4, section 11) also measured one of his thickest sections of upper John Day rocks.
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