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North Table Mountain, Golden, Golden District, Jefferson Co., Colorado, USAi
Regional Level Types
North Table MountainMountain
Golden- not defined -
Golden DistrictMining District
Jefferson Co.County
ColoradoState
USACountry

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Key
Lock Map
Latitude & Longitude (WGS84):
39° 47' 29'' North , 105° 12' 2'' West
Latitude & Longitude (decimal):
Locality type:
Nearest Settlements:
PlacePopulationDistance
Golden20,330 (2017)4.3km
Applewood7,160 (2011)5.0km
West Pleasant View3,840 (2011)6.8km
East Pleasant View356 (2011)8.0km
Arvada115,368 (2017)9.8km


See Drewes, H.(2008) for a detailed treatment of the geology of this locality.


Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

25 valid minerals.

Detailed Mineral List:

Analcime
Formula: Na(AlSi2O6) · H2O
Habit: trapazohedra to 5cm across
Colour: white to colorless
Description: 2 in. high, D. E. Kile, specimen and photo.
Reference: Eckel, E. (1997): Minerals of Colorado, photo 3; Tschernich, R. (1992): Zeolites of the World, 65
'Apophyllite'
Aragonite
Formula: CaCO3
Reference: Rocks & Minerals 79:4
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: Minerals of Colorado (1997) Eckel, E. B.
Baryte
Formula: BaSO4
Reference: Personally collected by Warren Cummings, circa 1969, from an isolated pocket near the basal contact of Flow 3 on the west side of N.T. Mt.
Calcite
Formula: CaCO3
Reference: Rocks & Minerals 79:4
Chabazite-Ca
Formula: (Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Habit: rhombohedra and penetration twins up to 1cm across
Colour: colorless, white, rarely pink
Reference: Rocks & Minerals 79:4; Tschernich, R. (1992): Zeolites of the World, 114
'Chlorite Group'
Reference: Rocks & Minerals 79:4
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Reference: Rocks & Minerals 79:4
Cowlesite
Formula: CaAl2Si3O10 · 6H2O
Description: Initially identified as scolecite.
Reference: Rocks & Minerals 79:4
Fluorapophyllite-(K)
Formula: KCa4(Si8O20)(F,OH) · 8H2O
Reference: Rocks & Minerals 79:4
Garronite-Ca
Formula: Na2Ca5Al12Si20O64 · 27H2O
Reference: Rocks & Minerals 79:4
Gonnardite
Formula: (Na,Ca)2(Si,Al)5O10 · 3H2O
Reference: Rocks & Minerals 79:4
Heulandite-Ca
Formula: (Ca,Na)5(Si27Al9)O72 · 26H2O
Reference: Rocks & Minerals 79:4
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Reference: Rocks & Minerals 79:4
'Lévyne'
Reference: warren cummings (2009), field experience 1965-77
Lévyne-Ca
Formula: (Ca,Na2,K2)[Al2Si4O12] · 6H2O
Reference: Rocks & Minerals 79:4
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Rocks & Minerals 79:4
Mesolite
Formula: Na2Ca2Si9Al6O30 · 8H2O
Reference: Rocks & Minerals 79:4
Mordenite
Formula: (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Reference: Minerals of Colorado (1997) E.B. Eckel
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Reference: Rocks & Minerals 79:4
Nontronite
Formula: Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Reference: Rocks & Minerals 79:4
Offretite
Formula: KCaMg(Si13Al5)O36 · 15H2O
Reference: Rocks & Minerals 79:4
Opal
Formula: SiO2 · nH2O
Reference: Rocks & Minerals 79:4
Opal var: Fire Opal
Formula: SiO2 · nH2O
Reference: Minerals of Colorado (1997) E.B. Eckel
Opal var: Wood Opal
Formula: SiO2 · nH2O
Reference: Minerals of Colorado (1997) E.B. Eckel
'Petrified Wood'
Reference: Minerals of Colorado (1997) E.B. Eckel
Phillipsite-Ca
Formula: (Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Reference: Rocks & Minerals 79:4
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Rocks & Minerals 79:4
Quartz
Formula: SiO2
Reference: Minerals of Colorado (1997) E.B. Eckels
Quartz var: Agate
Reference: Minerals of Colorado (1997) E.B. Eckel
Quartz var: Chalcedony
Formula: SiO2
Reference: Minerals of Colorado (1997) E.B. Eckels
'Smectite Group'
Formula: A0.3D2-3[T4O10]Z2 · nH2O
Reference: Rocks & Minerals 79:4
Stilbite-Ca
Formula: NaCa4[Al9Si27O72] · nH2O
Reference: Rocks & Minerals 79:4
Thomsonite-Ca
Formula: NaCa2[Al5Si5O20] · 6H2O
Reference: Rocks & Minerals 79:4

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Opal4.DA.10SiO2 · nH2O
var: Fire Opal4.DA.10SiO2 · nH2O
var: Wood Opal4.DA.10SiO2 · nH2O
Quartz4.DA.05SiO2
var: Agate4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Aragonite5.AB.15CaCO3
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Baryte7.AD.35BaSO4
Group 9 - Silicates
Analcime9.GB.05Na(AlSi2O6) · H2O
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Chabazite-Ca9.GD.10(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Cowlesite9.GG.05CaAl2Si3O10 · 6H2O
Fluorapophyllite-(K)9.EA.15KCa4(Si8O20)(F,OH) · 8H2O
Garronite-Ca9.GC.05Na2Ca5Al12Si20O64 · 27H2O
Gonnardite9.GA.05(Na,Ca)2(Si,Al)5O10 · 3H2O
Heulandite-Ca9.GE.05(Ca,Na)5(Si27Al9)O72 · 26H2O
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Lévyne-Ca9.GD.15(Ca,Na2,K2)[Al2Si4O12] · 6H2O
Mesolite9.GA.05Na2Ca2Si9Al6O30 · 8H2O
Mordenite9.GD.35(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Nontronite9.EC.40Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Offretite9.GD.25KCaMg(Si13Al5)O36 · 15H2O
Phillipsite-Ca9.GC.10(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Stilbite-Ca9.GE.10NaCa4[Al9Si27O72] · nH2O
Thomsonite-Ca9.GA.10NaCa2[Al5Si5O20] · 6H2O
Unclassified Minerals, Rocks, etc.
'Apophyllite'-
'Chlorite Group'-
'Limonite'-(Fe,O,OH,H2O)
'Lévyne'-
'Petrified Wood'-
'Smectite Group'-A0.3D2-3[T4O10]Z2 · nH2O

List of minerals arranged by Dana 8th Edition classification

Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
AXO4
Baryte28.3.1.1BaSO4
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Augite65.1.3a.3(CaxMgyFez)(Mgy1Fez1)Si2O6
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Sheets of 6-membered rings with 2:1 clays
Nontronite71.3.1a.3Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
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
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
Chabazite-Ca77.1.2.1(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Cowlesite77.1.5.8CaAl2Si3O10 · 6H2O
Garronite-Ca77.1.3.3Na2Ca5Al12Si20O64 · 27H2O
Gonnardite77.1.5.7(Na,Ca)2(Si,Al)5O10 · 3H2O
Heulandite-Ca77.1.4.1(Ca,Na)5(Si27Al9)O72 · 26H2O
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
'Lévyne'77.1.2.8
Mesolite77.1.5.4Na2Ca2Si9Al6O30 · 8H2O
Mordenite77.1.6.1(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O
Offretite77.1.2.4KCaMg(Si13Al5)O36 · 15H2O
Stilbite-Ca77.1.4.3NaCa4[Al9Si27O72] · nH2O
Unclassified Minerals, Mixtures, etc.
'Apophyllite'-
Aragonite-CaCO3
'Chlorite Group'-
'Limonite'-(Fe,O,OH,H2O)
Lévyne-Ca-(Ca,Na2,K2)[Al2Si4O12] · 6H2O
Opal
var: Fire Opal
-SiO2 · nH2O
var: Wood Opal-SiO2 · nH2O
'Petrified Wood'-
Phillipsite-Ca-(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Quartz
var: Agate
-SiO2
var: Chalcedony-SiO2
'Smectite Group'-A0.3D2-3[T4O10]Z2 · nH2O
Thomsonite-Ca-NaCa2[Al5Si5O20] · 6H2O

List of minerals for each chemical element

HHydrogen
H AnalcimeNa(AlSi2O6) · H2O
H Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H CowlesiteCaAl2Si3O10 · 6H2O
H Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
H Garronite-CaNa2Ca5Al12Si20O64 · 27H2O
H Gonnardite(Na,Ca)2(Si,Al)5O10 · 3H2O
H Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
H LaumontiteCaAl2Si4O12 · 4H2O
H Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2O
H Limonite(Fe,O,OH,H2O)
H MesoliteNa2Ca2Si9Al6O30 · 8H2O
H NatroliteNa2Al2Si3O10 · 2H2O
H NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
H OffretiteKCaMg(Si13Al5)O36 · 15H2O
H OpalSiO2 · nH2O
H Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
H PhlogopiteKMg3(AlSi3O10)(OH)2
H Smectite GroupA0.3D2-3[T4O10]Z2 · nH2O
H Stilbite-CaNaCa4[Al9Si27O72] · nH2O
H Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
H Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
H Opal (var: Fire Opal)SiO2 · nH2O
H Opal (var: Wood Opal)SiO2 · nH2O
CCarbon
C AragoniteCaCO3
C CalciteCaCO3
OOxygen
O AnalcimeNa(AlSi2O6) · H2O
O AragoniteCaCO3
O CalciteCaCO3
O Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O CowlesiteCaAl2Si3O10 · 6H2O
O Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
O Garronite-CaNa2Ca5Al12Si20O64 · 27H2O
O Gonnardite(Na,Ca)2(Si,Al)5O10 · 3H2O
O Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
O LaumontiteCaAl2Si4O12 · 4H2O
O Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2O
O Limonite(Fe,O,OH,H2O)
O MesoliteNa2Ca2Si9Al6O30 · 8H2O
O NatroliteNa2Al2Si3O10 · 2H2O
O NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
O OffretiteKCaMg(Si13Al5)O36 · 15H2O
O OpalSiO2 · nH2O
O Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
O PhlogopiteKMg3(AlSi3O10)(OH)2
O Smectite GroupA0.3D2-3[T4O10]Z2 · nH2O
O Stilbite-CaNaCa4[Al9Si27O72] · nH2O
O Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
O Opal (var: Fire Opal)SiO2 · nH2O
O Opal (var: Wood Opal)SiO2 · nH2O
O BaryteBaSO4
O QuartzSiO2
O Quartz (var: Chalcedony)SiO2
FFluorine
F Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
NaSodium
Na AnalcimeNa(AlSi2O6) · H2O
Na Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Na Garronite-CaNa2Ca5Al12Si20O64 · 27H2O
Na Gonnardite(Na,Ca)2(Si,Al)5O10 · 3H2O
Na Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
Na MesoliteNa2Ca2Si9Al6O30 · 8H2O
Na NatroliteNa2Al2Si3O10 · 2H2O
Na NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Na Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Na Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Na Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Na Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
MgMagnesium
Mg OffretiteKCaMg(Si13Al5)O36 · 15H2O
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
AlAluminium
Al AnalcimeNa(AlSi2O6) · H2O
Al Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Al CowlesiteCaAl2Si3O10 · 6H2O
Al Garronite-CaNa2Ca5Al12Si20O64 · 27H2O
Al Gonnardite(Na,Ca)2(Si,Al)5O10 · 3H2O
Al Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
Al LaumontiteCaAl2Si4O12 · 4H2O
Al Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2O
Al MesoliteNa2Ca2Si9Al6O30 · 8H2O
Al NatroliteNa2Al2Si3O10 · 2H2O
Al NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Al OffretiteKCaMg(Si13Al5)O36 · 15H2O
Al Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Al Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Al Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
SiSilicon
Si AnalcimeNa(AlSi2O6) · H2O
Si Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si CowlesiteCaAl2Si3O10 · 6H2O
Si Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Si Garronite-CaNa2Ca5Al12Si20O64 · 27H2O
Si Gonnardite(Na,Ca)2(Si,Al)5O10 · 3H2O
Si Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
Si LaumontiteCaAl2Si4O12 · 4H2O
Si Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2O
Si MesoliteNa2Ca2Si9Al6O30 · 8H2O
Si NatroliteNa2Al2Si3O10 · 2H2O
Si NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Si OffretiteKCaMg(Si13Al5)O36 · 15H2O
Si OpalSiO2 · nH2O
Si Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Si Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Si Opal (var: Fire Opal)SiO2 · nH2O
Si Opal (var: Wood Opal)SiO2 · nH2O
Si QuartzSiO2
Si Quartz (var: Chalcedony)SiO2
SSulfur
S BaryteBaSO4
KPotassium
K Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
K Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
K OffretiteKCaMg(Si13Al5)O36 · 15H2O
K Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
K PhlogopiteKMg3(AlSi3O10)(OH)2
K Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
CaCalcium
Ca AragoniteCaCO3
Ca CalciteCaCO3
Ca Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Ca CowlesiteCaAl2Si3O10 · 6H2O
Ca Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Ca Garronite-CaNa2Ca5Al12Si20O64 · 27H2O
Ca Gonnardite(Na,Ca)2(Si,Al)5O10 · 3H2O
Ca Heulandite-Ca(Ca,Na)5(Si27Al9)O72 · 26H2O
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2O
Ca MesoliteNa2Ca2Si9Al6O30 · 8H2O
Ca OffretiteKCaMg(Si13Al5)O36 · 15H2O
Ca Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Ca Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Ca Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca Mordenite(Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
FeIron
Fe Limonite(Fe,O,OH,H2O)
Fe NontroniteNa0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
CuCopper
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
BaBarium
Ba Phillipsite-Ca(Ca0.5,K,Na,Ba0.5)4-7[Al4-7Si12-9O32] . 12H2O
Ba BaryteBaSO4

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Paleocene
56 - 66 Ma



ID: 2208849
Potassic basalt (shoshonite) lava flows

Age: Paleocene (56 - 66 Ma)

Description: Dark-gray, porphyritic flow rock containing small pheonocrysts of augite, plagioclase, magnetite, and olivine in a fine-grained matrix. Called mafic latite by Van Horn (1976), although only upper flows are latitic; basal flow is a trachytitic basalt. Formerly mapped as three flows on North Table Mountain and two flows on South Table Mountain (Van Horn, 1976); four total flows now recognized (Drewes, 2004). Clinkery bases and vesicular tops are visible, except on upper flow where top is eroded. Locally forms prominent cliffs. Cavities at some localities contain a variety of zeolite minerals (Ellemeier, 1947). Flows most likely erupted from Ralston Buttes area, about 5 km north of Golden. Interlayered with and considered here as members of Denver Formation. 40Ar/39Ar age of upper flow is 63.9±1.2 Ma (Obradovich, 2002). Flows are as thick as 30 m where they filled channels

Reference: Kellogg, K.S., Shroba, R.R., Bryant, Bruce, and Premo, W.R. Geologic Map of the Denver West 30' x 60' Quadrangle, North- Central Colorado. USGS Geologic Investigations Series 3000. [35]

Danian
61.6 - 66 Ma



ID: 2977433
Basaltic flows in Denver Fm near Golden

Age: Paleocene (61.6 - 66 Ma)

Stratigraphic Name: Denver Formation

Comments: Original map source: Green, G.N., 1992, The Digital Geologic Map of Colorado in ARC/INFO Format: U.S. Geological Survey Open-File Report 92-0507, 9 p., scale 1:500,000.

Lithology: Major:{basalt}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Early Paleocene
61.6 - 66 Ma



ID: 2446614
Shoshonite

Age: Paleocene (61.6 - 66 Ma)

Description: Dark-gray porphyritic lava flows capping North and South Table Mountains and forming dikes near Ralston Reservoir (also includes Flagstaff Mountain sill near Boulder, dated at 64 m.y. by Hoblitt and Larson, 1975). Includes Table Mountain Shoshonite (Scott, 1972) and monzonite and latite of Van Horn (1972). Three flows recognized in North Table Mountain and two flows recognized in South Table Mountain. Total thickness of flows about 73 m. Age of middle flow probably is 63-64 m.y. (Scott, 1972) and age of Ralston Reservoir intrusive is 62 m.y. (Hoblitt and Larson, 1975).

Reference: Trimble, D.E., M.N. Machette. Geologic Map of the Greater Denver Area, Front Range Urban Corridor, Colorado. U.S. Geological Survey Geologic Investigations Series I-856-H. [64]

Triassic
201.3 - 251.902 Ma



ID: 3191821
Mesozoic sedimentary rocks

Age: Triassic (201.3 - 251.902 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Drewes, H., 2008, Table Mountain shoshonite porphyry lava flows and their vents, Golden, Colorado: U.S. Geological Survey Scientific Investigations Report 2006–5242, 28 p.
Kile, E.D. (2004) Zeolites and Associated Minerals from the Table Mountains near Golden , Jefferson County, Colorado. Rocks and Minerals, Vol. 79 No. 4, (Zeolites special Issue) , 218-238.
Kile, J. and Modreski,P., 1988, Zeolites and Related Minerals from the Table Mountain Lava Flows near Golden, Colorado, "The Mineralogical Record" (Vol. 19 No. 3, May/June, pgs. 153-184)
Tschernich, R. (1992): Zeolites of the World, 65
Eckel, E. (1997): Minerals of Colorado, photo 3

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