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Devils Backbone, North Fork John Day River, Grant Co., Oregon, USA

This page kindly sponsored by Douglas Merson
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Latitude & Longitude (WGS84): 44° 58' 49'' North , 119° 11' 54'' West
Latitude & Longitude (decimal): 44.98028,-119.19861
GeoHash:G#: 9rgpzs6jp
Köppen climate type:Csb : Warm-summer Mediterranean climate


Zeolites occur along the road along the North Fork of the John Day River, in Grant County, Oregon. The best site known as Devils Backbone is named after the ridge intersecting the river 12.5 miles west of Highway 395 from the Camas Creek Bridge. The site was first found in the 1960's by Isabelle Mattison when the road was made for logging. The road was gated and locked until the 1970's, when Rudy Tschernich relocated the site.

Zeolites are abundant in a hard black basalt. The basalt flows belong to the Picture Gorge member of the Columbia River Basalt Group and is of Miocene age (Radiometric date of 16.5 m.y.o.). The basalt is massive to columnar with the cavities elongated in the flow direction.

Collecting in the cliff is difficult although large boulders often fall down to the road in the winter making it easy to collect in them in the spring.

Rudy Tschernich

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Standard Detailed Strunz Dana Chemical Elements

Mineral List


9 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Analcime
Formula: Na(AlSi2O6) · H2O
Habit: trapezohedra to 8mm in diameter
Colour: transparent
Description: found in cavities in basalt
Reference: Micro Probe Vol. 6 No. 8; Tschernich, R. (1992): Zeolites of the World, 70
'Basalt'
Reference: Tschernich, R.W. (1989) Zeolites along the North Fork of the John Day River, Grant County, Oregon. Micro Probe: 6(8): 10-13.
Calcite
Formula: CaCO3
Description: found in cavities in basalt
Reference: Micro Probe Volume VI Number 8
'Chabazite'
Description: found in cavities in basalt
Reference: Micro Probe Volume VI Number 8
Fluorapophyllite-(K)
Formula: KCa4(Si8O20)(F,OH) · 8H2O
Description: found in cavities in basalt
Reference: Micro Probe Volume VI Number 8
'Gismondine'
Description: found in vugs in basalt
Reference: MicroProbe Vol. VI Num. 8
'Gmelinite'
Description: found in cavities in basalt
Reference: Micro Probe Volume VI Number 8
Gyrolite
Formula: NaCa16Si23AlO60(OH)8 · 14H2O
Description: found in cavities in basalt
Reference: Micro Probe Volume VI Number 8
'Lévyne'
Reference: Rudy Tschernich Zeolite Collection
Mesolite
Formula: Na2Ca2Si9Al6O30 · 8H2O
Description: found in cavities in basalt
Reference: Micro Probe Volume VI Number 8
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Description: found in cavities in basalt
Reference: Micro Probe Volume VI Number 8
Offretite
Formula: KCaMg(Si13Al5)O36 · 15H2O
Reference: Rudy Tschernich Zeolite Collection
'Phillipsite'
Description: found in cavities in basalt
Reference: Micro Probe Volume VI Number 8
Tacharanite
Formula: Ca12Al2Si18O33 (OH)36
Reference: Micro Probe (1989) Volume VI Number 8 pp 10-13
Thomsonite-Ca
Formula: NaCa2[Al5Si5O20] · 6H2O
Description: found in cavities in basalt
Reference: Micro Probe Volume VI Number 8

List of minerals arranged by Strunz 10th Edition classification

Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
Group 9 - Silicates
'Analcime'9.GB.05Na(AlSi2O6) · H2O
'Fluorapophyllite-(K)'9.EA.15KCa4(Si8O20)(F,OH) · 8H2O
'Gismondine'9..
'Gyrolite'9.EE.30NaCa16Si23AlO60(OH)8 · 14H2O
'Mesolite'9.GA.05Na2Ca2Si9Al6O30 · 8H2O
'Natrolite'9.GA.05Na2Al2Si3O10 · 2H2O
'Offretite'9.GD.25KCaMg(Si13Al5)O36 · 15H2O
'Tacharanite'9.HA.75Ca12Al2Si18O33 (OH)36
'Thomsonite-Ca'9.GA.10NaCa2[Al5Si5O20] · 6H2O
Unclassified Minerals, Rocks, etc.
'Basalt'-
'Chabazite'-
'Gmelinite'-
'Lévyne'-
'Phillipsite'-

List of minerals arranged by Dana 8th Edition classification

Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 72 - PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 3-, 4-, or 5-membered rings and 8-membered rings
Fluorapophyllite-(K)72.3.1.1KCa4(Si8O20)(F,OH) · 8H2O
Tacharanite72.3.2.6Ca12Al2Si18O33 (OH)36
Group 73 - PHYLLOSILICATES Condensed Tetrahedral Sheets
Condensed Tetrahedral Sheets with double and single layers
Gyrolite73.2.2c.1NaCa16Si23AlO60(OH)8 · 14H2O
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
'Gismondine'77.1.3.1
'Lévyne'77.1.2.8
Mesolite77.1.5.4Na2Ca2Si9Al6O30 · 8H2O
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O
Offretite77.1.2.4KCaMg(Si13Al5)O36 · 15H2O
Unclassified Minerals, Rocks, etc.
'Basalt'-
'Chabazite'-
'Gmelinite'-
'Phillipsite'-
Thomsonite-Ca-NaCa2[Al5Si5O20] · 6H2O

List of minerals for each chemical element

HHydrogen
H AnalcimeNa(AlSi2O6) · H2O
H Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
H GyroliteNaCa16Si23AlO60(OH)8 · 14H2O
H MesoliteNa2Ca2Si9Al6O30 · 8H2O
H NatroliteNa2Al2Si3O10 · 2H2O
H OffretiteKCaMg(Si13Al5)O36 · 15H2O
H TacharaniteCa12Al2Si18O33 (OH)36
H Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
CCarbon
C CalciteCaCO3
OOxygen
O AnalcimeNa(AlSi2O6) · H2O
O CalciteCaCO3
O Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
O GyroliteNaCa16Si23AlO60(OH)8 · 14H2O
O MesoliteNa2Ca2Si9Al6O30 · 8H2O
O NatroliteNa2Al2Si3O10 · 2H2O
O OffretiteKCaMg(Si13Al5)O36 · 15H2O
O TacharaniteCa12Al2Si18O33 (OH)36
O Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
FFluorine
F Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
NaSodium
Na AnalcimeNa(AlSi2O6) · H2O
Na GyroliteNaCa16Si23AlO60(OH)8 · 14H2O
Na MesoliteNa2Ca2Si9Al6O30 · 8H2O
Na NatroliteNa2Al2Si3O10 · 2H2O
Na Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
MgMagnesium
Mg OffretiteKCaMg(Si13Al5)O36 · 15H2O
AlAluminium
Al AnalcimeNa(AlSi2O6) · H2O
Al GyroliteNaCa16Si23AlO60(OH)8 · 14H2O
Al MesoliteNa2Ca2Si9Al6O30 · 8H2O
Al NatroliteNa2Al2Si3O10 · 2H2O
Al OffretiteKCaMg(Si13Al5)O36 · 15H2O
Al TacharaniteCa12Al2Si18O33 (OH)36
Al Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
SiSilicon
Si AnalcimeNa(AlSi2O6) · H2O
Si Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Si GyroliteNaCa16Si23AlO60(OH)8 · 14H2O
Si MesoliteNa2Ca2Si9Al6O30 · 8H2O
Si NatroliteNa2Al2Si3O10 · 2H2O
Si OffretiteKCaMg(Si13Al5)O36 · 15H2O
Si TacharaniteCa12Al2Si18O33 (OH)36
Si Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
KPotassium
K Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
K OffretiteKCaMg(Si13Al5)O36 · 15H2O
CaCalcium
Ca CalciteCaCO3
Ca Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Ca GyroliteNaCa16Si23AlO60(OH)8 · 14H2O
Ca MesoliteNa2Ca2Si9Al6O30 · 8H2O
Ca OffretiteKCaMg(Si13Al5)O36 · 15H2O
Ca TacharaniteCa12Al2Si18O33 (OH)36
Ca Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Tschernich, R.W. (1989) Zeolites along the North Fork of the John Day River, Grant County, Oregon. Micro Probe: 6(8): 10-13.
Tschernich, R.W. (1992) Zeolites of the World. Geoscience Press, Phoenix, Arizona.
Tschernich, R.W. (1993) Gismondine from the North Fork of the John Day River, Grant County, Central Oregon. Micro Probe: 7(8): 18-19.


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