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Cascadilla Gorge Kimberlite Dike, Ithaca, Tompkins Co., New York, USA

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Key
Lock Map
Latitude & Longitude (WGS84): 42° 28' 47'' North , 76° 28' 12'' West
Latitude & Longitude (decimal): 42.47972,-76.47000
GeoHash:G#: dr99evhnr
Locality type:Dike
Köppen climate type:Dfb : Warm-summer humid continental climate


Vertical dikes in the prominent north-south joint sets in the Ithaca area. The kimberlites are Late Jurassic to Early Cretaceous (140may) in age and are not diamondiferous.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


8 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:

Amphibole Supergroup
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Kay, S. M., Snedden, W. T., Foster, B. P., and Kay, R. W., 1983. Upper Mantle and Crustal Fragments in the Ithaca Kimberlites. Journal of Geology (91), pages 277-290.
'Apatite'
Reference: Martens, J.H.C., 1924. Igenous rocks of Thaca, New York and vicinity. Geological Society of Ameria Bulletin (35): p. 305-320.
Calcite
Formula: CaCO3
Reference: Martens, J.H.C., 1924. Igenous rocks of Thaca, New York and vicinity. Geological Society of Ameria Bulletin (35): p. 305-320.
'Chlorite Group'
Reference: Martens, J.H.C., 1924. Igenous rocks of Thaca, New York and vicinity. Geological Society of Ameria Bulletin (35): p. 305-320.
Diopside
Formula: CaMgSi2O6
Reference: Kay, S. M., Snedden, W. T., Foster, B.P., and Kay, R.W., 1983. Upper mantle and crustal fragments in the Ithaca kimberlites. Journal of Geology (91): p. 277-290.
Diopside var: Chromian Diopside
Formula: Ca(Mg,Cr)Si2O6
Reference: Kay, S. M., Snedden, W. T., Foster, B.P., and Kay, R.W., 1983. Upper mantle and crustal fragments in the Ithaca kimberlites. Journal of Geology (91): p. 277-290.
'Fayalite-Forsterite Series'
Reference: Martens, J.H.C., 1924. Igenous rocks of Thaca, New York and vicinity. Geological Society of Ameria Bulletin (35): p. 305-320.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Kay, S. M., Snedden, W. T., Foster, B. P., and Kay, R. W., 1983. Upper Mantle and Crustal Fragments in the Ithaca Kimberlites. Journal of Geology (91), pages 277-290.
'Kimberlite'
Reference: U.S. Geological Survey, (2005) Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Martens, J.H.C., 1924. Igenous rocks of Thaca, New York and vicinity. Geological Society of Ameria Bulletin (35): p. 305-320.
Perovskite
Formula: CaTiO3
Reference: Martens, J.H.C., 1924. Igenous rocks of Thaca, New York and vicinity. Geological Society of Ameria Bulletin (35): p. 305-320.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: Kay, S. M., Snedden, W. T., Foster, B. P., and Kay, R. W., 1983. Upper Mantle and Crustal Fragments in the Ithaca Kimberlites. Journal of Geology (91), pages 277-290.
Pyrope
Formula: Mg3Al2(SiO4)3
Reference: Kay, S. M., Snedden, W. T., Foster, B. P., and Kay, R. W., 1983. Upper Mantle and Crustal Fragments in the Ithaca Kimberlites. Journal of Geology (91), pages 277-290.
'Pyroxene Group'
Reference: Kay, S. M., Snedden, W. T., Foster, B. P., and Kay, R. W., 1983. Upper Mantle and Crustal Fragments in the Ithaca Kimberlites. Journal of Geology (91), pages 277-290.
Spinel
Formula: MgAl2O4
Reference: Kay, S. M., Snedden, W. T., Foster, B. P., and Kay, R. W., 1983. Upper Mantle and Crustal Fragments in the Ithaca Kimberlites. Journal of Geology (91), pages 277-290.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Magnetite4.BB.05Fe2+Fe3+2O4
Perovskite4.CC.30CaTiO3
Spinel4.BB.05MgAl2O4
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
Group 9 - Silicates
Diopside9.DA.15CaMgSi2O6
var: Chromian Diopside9.DA.15Ca(Mg,Cr)Si2O6
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Pyrope9.AD.25Mg3Al2(SiO4)3
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Apatite'-
'Chlorite Group'-
Fayalite-Forsterite Series-
Garnet Group-X3Z2(SiO4)3
Kimberlite-
Pyroxene Group-

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Perovskite4.3.3.1CaTiO3
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Spinel7.2.1.1MgAl2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Pyrope51.4.3a.1Mg3Al2(SiO4)3
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Unclassified Minerals, Rocks, etc.
Amphibole Supergroup-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Apatite'-
'Chlorite Group'-
Diopside
var: Chromian Diopside
-Ca(Mg,Cr)Si2O6
'Fayalite-Forsterite Series'-
'Garnet Group'-X3Z2(SiO4)3
'Kimberlite'-
'Pyroxene Group'-

List of minerals for each chemical element

HHydrogen
H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H PhlogopiteKMg3(AlSi3O10)(OH)2
CCarbon
C CalciteCaCO3
OOxygen
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O CalciteCaCO3
O Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
O DiopsideCaMgSi2O6
O Garnet GroupX3Z2(SiO4)3
O MagnetiteFe2+Fe23+O4
O PerovskiteCaTiO3
O PhlogopiteKMg3(AlSi3O10)(OH)2
O PyropeMg3Al2(SiO4)3
O SpinelMgAl2O4
FFluorine
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
MgMagnesium
Mg Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
Mg DiopsideCaMgSi2O6
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
Mg PyropeMg3Al2(SiO4)3
Mg SpinelMgAl2O4
AlAluminium
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al PhlogopiteKMg3(AlSi3O10)(OH)2
Al PyropeMg3Al2(SiO4)3
Al SpinelMgAl2O4
SiSilicon
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
Si DiopsideCaMgSi2O6
Si Garnet GroupX3Z2(SiO4)3
Si PhlogopiteKMg3(AlSi3O10)(OH)2
Si PyropeMg3Al2(SiO4)3
ClChlorine
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
KPotassium
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca CalciteCaCO3
Ca Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
Ca DiopsideCaMgSi2O6
Ca PerovskiteCaTiO3
TiTitanium
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Ti PerovskiteCaTiO3
CrChromium
Cr Diopside (var: Chromian Diopside)Ca(Mg,Cr)Si2O6
FeIron
Fe MagnetiteFe2+Fe23+O4

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

Paleozoic
251.902 - 541 Ma



ID: 3187973
Paleozoic sedimentary rocks

Age: Phanerozoic (251.902 - 541 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]

Late Devonian
358.9 - 382.7 Ma



ID: 2753307
Genesee Group

Age: Late Devonian (358.9 - 382.7 Ma)

Stratigraphic Name: West River Shale; Genundewa Limestone; Penn Yan Shale; Geneseo Shale

Description: West River Shale; Genundewa Limestone; Penn Yan and Geneseo Shales; all except Geneseo replaced eastwardly by Ithaca Formation-shale, siltstone and Sherburne Siltstone.

Comments: 200-1000 ft. (60-300 m). Secondary unit descriptions from USGS Lexicon website (ref. NY046) and reference NY015: Genesee Formation extended from southwestern NY and western PA into eastern OH and northern WV (de Witt and others, 1993). West of Canandaigua Lake in western NY, the gray shale sequence above the Geneseo Shale Member of the Genesee Formation comprises the Penn Yan Shale Member, the Genundewa Limestone Member, and the West River Shale Member. The Penn Yan, at the base of the sequence, contains the Middle and Upper Devonian boundary. The Genundewa Limestone Member is an irregular- to flaggy-bedded limestone composed largely of the shells of the tiny pteropod STYLIOLINA FISSURELLA. It is only a local unit and does not extend beyond the southern NY border (de Witt and others, 1993). Penn Yan Shale Member of Genesee Formation extended from southwestern NY into western PA. West of Canandaigua Lake in western NY, the boundary between the Middle and the Upper Devonian lies within the lower part of the Penn Yan. Unit consists mainly of dark- to medium-gray shale or mudrock and some beds of black shale, abundant limestone nodules, and a few thin beds of dark-gray siltstone. The Penn Yan is overstepped to the southwest along the Middle Devonian unconformity by the West River Shale Member. To the east of Canandaigua Lake, the Penn Yan and the West River grad laterally into the Sherburne Flagstone and Ithaca Members (de Witt and others, 1993). Original map source: NYS Museum, NYS Geological Survey, NYS Museum Technology Center, 1999, bedrock geology of NYS data is distributed in ARC/INFOr EXPORT format (with '.e00' extension) in 5 seperate files based on 1970 printed map sheets, scale 1:250,000.

Lithology: Major:{shale}, Minor:{limestone,siltstone}, Incidental:{black shale}

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]

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)
Kay, S. M., Snedden, W. T., Foster, B. P., and Kay, R. W. (1983). Upper Mantle and Crustal Fragments in the Ithaca Kimberlites. Journal of Geology: 91: 277-290.


This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
 
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