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Two Mouthed Cave, Island Magee, Co. Antrim, Northern Ireland, UKi
Regional Level Types
Two Mouthed CaveCave
Island Magee- not defined -
Co. Antrim- not defined -
Northern IrelandConstituent Country
UKCountry

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Key
Lock Map
Latitude & Longitude (WGS84):
54° 50' 31'' North , 5° 43' 7'' West
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Larne18,421 (2016)6.3km
Whitehead3,697 (2016)9.9km
Carrickfergus29,208 (2016)15.1km
Greenisland5,073 (2016)18.6km
Ballyclare9,472 (2016)20.6km


Sea cave on coast ca. 500 metres S.E. of Port Muck, Island Magee. Accessible at low tide. Small (a few cm) amygdales are abundant in basalt here, and for several hundred metres northwards towards Port Muck. Yellow/orange gmelinite-Na is especially common. Levyne-Ca is locally abundant. Irish grid ref. D 464018.

Regions containing this locality

Eurasian PlateTectonic Plate
British IslesGroup of Islands
Ireland (island)Island

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


6 valid minerals.

Detailed Mineral List:

Analcime
Formula: Na(AlSi2O6) · H2O
Reference: Walker, G.P.L. (1959) Mineralogical Magazine 32(246), p. 202-217.
Calcite
Formula: CaCO3
Reference: Walker, G.P.L. (1959) Mineralogical Magazine 32(246), p. 202-217.
Gmelinite-Na
Formula: Na4(Si8Al4O24] · 11H2O
Colour: yellow-orange
Description: XRF indicates near pure gmelinite-Na composition. (S. Moreton, unpublished analysis, 2010).
Reference: Walker, G.P.L. (1959) Mineralogical Magazine 32(246), p. 202-217.
Gobbinsite
Formula: Na5(Si11Al5)O32 · 11H2O
Reference: Ryback, G., Nawaz, R. and Farley, E. (1988) Seventh Supplementary List of British Isles Minerals (Irish). Mineralogical Magazine, vol. 52, n° 365, pp. 267-274.; Alberti, A., Armbruster, T., Artioli, G., Colella, C., Galli, E., Grice, J. D., ... & Vezzalini, G. (1998) Recommended nomenclature for zeolite minerals: report of the subcommittee on zeolites of the International Mineralogical Association, Commission on New Minerals and Mineral Names. Mineralogical Magazine, 62(4), 533-571.
Lévyne-Ca
Formula: (Ca,Na2,K2)[Al2Si4O12] · 6H2O
Colour: White
Description: XRF analysis indicates levyne-Ca composition. (S. Moreton, unpublished analysis, 2010).
Reference: Walker, G.P.L. (1959) Mineralogical Magazine 32(246), p. 202-217.
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Reference: Walker, G.P.L. (1959) Mineralogical Magazine 32(246), p. 202-217.
'Phillipsite'
Colour: Pinkish
Description: XRF analysis indicates intermediate composition. Possibly both Na and Ca dominant zones are present within the same specimens but with molar Na > Ca overall in the two specimens analysed. (S. Moreton, unpublished analysis, 2010).
Reference: Walker, G.P.L. (1959) Mineralogical Magazine 32(246), p. 202-217.

List of minerals arranged by Strunz 10th Edition classification

Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 9 - Silicates
Analcime9.GB.05Na(AlSi2O6) · H2O
Gmelinite-Na9.GD.05Na4(Si8Al4O24] · 11H2O
Gobbinsite9.GC.05Na5(Si11Al5)O32 · 11H2O
Lévyne-Ca9.GD.15(Ca,Na2,K2)[Al2Si4O12] · 6H2O
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Unclassified Minerals, Rocks, etc.
'Phillipsite'-

List of minerals arranged by Dana 8th Edition classification

Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
Gobbinsite77.1.3.4Na5(Si11Al5)O32 · 11H2O
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O
Unclassified Minerals, Mixtures, etc.
Gmelinite-Na-Na4(Si8Al4O24] · 11H2O
Lévyne-Ca-(Ca,Na2,K2)[Al2Si4O12] · 6H2O
'Phillipsite'-

List of minerals for each chemical element

HHydrogen
H Gmelinite-NaNa4(Si8Al4O24] · 11H2O
H NatroliteNa2Al2Si3O10 · 2H2O
H Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2O
H AnalcimeNa(AlSi2O6) · H2O
H GobbinsiteNa5(Si11Al5)O32 · 11H2O
CCarbon
C CalciteCaCO3
OOxygen
O Gmelinite-NaNa4(Si8Al4O24] · 11H2O
O NatroliteNa2Al2Si3O10 · 2H2O
O Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2O
O AnalcimeNa(AlSi2O6) · H2O
O CalciteCaCO3
O GobbinsiteNa5(Si11Al5)O32 · 11H2O
NaSodium
Na Gmelinite-NaNa4(Si8Al4O24] · 11H2O
Na NatroliteNa2Al2Si3O10 · 2H2O
Na AnalcimeNa(AlSi2O6) · H2O
Na GobbinsiteNa5(Si11Al5)O32 · 11H2O
AlAluminium
Al Gmelinite-NaNa4(Si8Al4O24] · 11H2O
Al NatroliteNa2Al2Si3O10 · 2H2O
Al Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2O
Al AnalcimeNa(AlSi2O6) · H2O
Al GobbinsiteNa5(Si11Al5)O32 · 11H2O
SiSilicon
Si Gmelinite-NaNa4(Si8Al4O24] · 11H2O
Si NatroliteNa2Al2Si3O10 · 2H2O
Si Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2O
Si AnalcimeNa(AlSi2O6) · H2O
Si GobbinsiteNa5(Si11Al5)O32 · 11H2O
CaCalcium
Ca Lévyne-Ca(Ca,Na2,K2)[Al2Si4O12] · 6H2O
Ca CalciteCaCO3

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: 3133914
Palaeocene undifferentiated

Age: Paleocene (56 - 66 Ma)

Lithology: Volcanic

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Late Cretaceous
66 - 100.5 Ma



ID: 2033925
Hibernian Greensands Formation And Ulster White Limestone Formation (Undifferentiated)

Age: Late Cretaceous (66 - 100.5 Ma)

Stratigraphic Name: Hibernian Greensands Formation; Ulster White Limestone Formation

Lithology: Chalk and sandstone

Reference: British Geological Survey. DiGMapGB-625. British Geological Survey ©NERC. [23]

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

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Walker, G.P.L. (1959) The amygdale minerals in the Tertiary lavas of Ireland, II. The distribution of gmelinite. Mineralogical Magazine, vol. 32, part 246, p. 202-217.
Ryback, G., Nawaz, R. and Farley, E. (1988) Seventh Supplementary List of British Isles Minerals (Irish). Mineralogical Magazine, vol. 52, n° 365, pp. 267-274.

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