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Scawt Hill, Larne, County Antrim, Northern Ireland, UKi
Regional Level Types
Scawt HillVolcanic Plug
LarneTown
County AntrimCounty
Northern IrelandConstituent Country
UKCountry

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Latitude & Longitude (WGS84):
54° 54' 37'' North , 5° 54' 55'' West
Latitude & Longitude (decimal):
UK National Grid Reference:
NW540573
Köppen climate type:
Nearest Settlements:
PlacePopulationDistance
Larne18,421 (2016)9.2km
Carnlough1,427 (2016)10.2km
Glenariff1,286 (2016)18.3km
Ballyclare9,472 (2016)18.5km
Broughshane2,581 (2016)18.9km
Mindat Locality ID:
2452
Long-form identifier:
mindat:1:2:2452:8
GUID (UUID V4):
0


Scawt Hill is a volcanic plug in County Antrim, Northern Ireland, in the borough of Larne, 5 km from the village of Ballygally.

It gets its name from the Ulster Scots "scawd" meaning "scaly", "scabby" or "rugged". Alternatively, 'scawt' can also mean "scruffy" and "contemptible", and, when applied to rocks, "covered in barnacles".

Contact-metamorphosed limestones and dolostones intruded by diabase. Famous for being the type locality of various hydrated Ca-silicates. These minerals were formed when the existing chalk of the area was intensely altered by the intrusion of the feeder tube of an ancient volcano, now long since cooled and eroded to its roots.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List


29 valid minerals. 6 (TL) - type locality of valid minerals. 1 erroneous literature entry.

Rock Types Recorded


Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Aegirine
Formula: NaFe3+Si2O6
Afwillite
Formula: Ca3[SiO4][SiO2(OH)2] · 2H2O
Description: Occurs in a contact zone between limestone and dolerite.
Analcime
Formula: Na(AlSi2O6) · H2O
Anorthite
Formula: Ca(Al2Si2O8)
Anorthite var. Labradorite
Formula: (Ca,Na)[Al(Al,Si)Si2O8]
Åkermanite
Formula: Ca2Mg[Si2O7]
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Augite var. Titanium-bearing Augite
Formula: (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
Bredigite (TL)
Formula: Ca7Mg(SiO4)4
Type Locality:
Calcite
Formula: CaCO3
Cebollite
Formula: Ca5Al2(SiO4)3(OH)4
Diopside
Formula: CaMgSi2O6
Ettringite
Formula: Ca6Al2(SO4)3(OH)12 · 26H2O
Description: Occurs in a contact zone between limestone and dolerite.
Ferrobustamite
Formula: CaFe2+(Si2O6)
Description: In American Mineralogist, Volume 60, pages 209-212, 1975, the highest iron content of wollastonite is 2.23 percent FeO, in the wollastonite composition field.
Gehlenite
Formula: Ca2Al[AlSiO7]
Hydrocalumite (TL)
Formula: Ca4Al2(OH)12(Cl,CO3,OH)2 · 4H2O
Type Locality:
Description: Occurs in a contaxct zone between limestone and dolerite.
Larnite (TL)
Formula: Ca2SiO4
Type Locality:
References:
Magnetite
Formula: Fe2+Fe3+2O4
'Melilite Group'
Formula: Ca2M(XSiO7)
Okenite
Formula: Ca10Si18O46 · 18H2O
Pectolite
Formula: NaCa2Si3O8(OH)
Perovskite
Formula: CaTiO3
'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
Plombièrite
Formula: Ca5Si6O16(OH)2 · 7H2O
Portlandite (TL)
Formula: Ca(OH)2
Type Locality:
Description: Occurs in a contact zone between limestone and dolerite.
'Pyroxene Group'
Formula: ADSi2O6
Quartz
Formula: SiO2
Rankinite (TL)
Formula: Ca3Si2O7
Type Locality:
Scawtite (TL)
Formula: Ca7(Si3O9)2CO3 · 2H2O
Type Locality:
Habit: Tilley & Hey (1930): plates flattened in the plane of the principal cleavage. Frequently these form subparallel or slightly divergent clusters. Owing to mutual interference and intergrowth with the surrounding minerals no well-defined crystals can be isolated. The largest individuals met with do not exceed 1.5 mm. in length.
Colour: colourless with vitreous lustre
Spinel
Formula: MgAl2O4
Spurrite
Formula: Ca5(SiO4)2(CO3)
'Thomsonite Subgroup'
Titanite
Formula: CaTi(SiO4)O
Tobermorite
Formula: Ca5Si6O17 · 5H2O
Wollastonite
Formula: Ca3(Si3O9)
Xonotlite
Formula: Ca6(Si6O17)(OH)2

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Magnetite4.BB.05Fe2+Fe3+2O4
Spinel4.BB.05MgAl2O4
Perovskite4.CC.30CaTiO3
Quartz4.DA.05SiO2
Portlandite (TL)4.FE.05Ca(OH)2
Hydrocalumite (TL)4.FL.10Ca4Al2(OH)12(Cl,CO3,OH)2 · 4H2O
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Ettringite7.DG.15Ca6Al2(SO4)3(OH)12 · 26H2O
Group 9 - Silicates
Larnite (TL)9.AD.05Ca2SiO4
Bredigite (TL)9.AD.20Ca7Mg(SiO4)4
Titanite9.AG.15CaTi(SiO4)O
Afwillite9.AG.75Ca3[SiO4][SiO2(OH)2] · 2H2O
Spurrite9.AH.15Ca5(SiO4)2(CO3)
Åkermanite9.BB.10Ca2Mg[Si2O7]
Cebollite9.BB.10Ca5Al2(SiO4)3(OH)4
Gehlenite9.BB.10Ca2Al[AlSiO7]
Rankinite (TL)9.BC.15Ca3Si2O7
Scawtite (TL)9.CK.15Ca7(Si3O9)2CO3 · 2H2O
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Diopside9.DA.15CaMgSi2O6
Augite
var. Titanium-bearing Augite
9.DA.15(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
Aegirine9.DA.25NaFe3+Si2O6
Ferrobustamite ?9.DG.05CaFe2+(Si2O6)
Pectolite9.DG.05NaCa2Si3O8(OH)
Wollastonite9.DG.05Ca3(Si3O9)
Plombièrite9.DG.08Ca5Si6O16(OH)2 · 7H2O
Tobermorite9.DG.10Ca5Si6O17 · 5H2O
Xonotlite9.DG.35Ca6(Si6O17)(OH)2
Okenite9.EA.40Ca10Si18O46 · 18H2O
Anorthite9.FA.35Ca(Al2Si2O8)
var. Labradorite9.FA.35(Ca,Na)[Al(Al,Si)Si2O8]
Analcime9.GB.05Na(AlSi2O6) · H2O
Unclassified
'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
'Pyroxene Group'-ADSi2O6
'Thomsonite Subgroup'-
'Melilite Group'-Ca2M(XSiO7)

List of minerals for each chemical element

HHydrogen
H AfwilliteCa3[SiO4][SiO2(OH)2] · 2H2O
H AnalcimeNa(AlSi2O6) · H2O
H CebolliteCa5Al2(SiO4)3(OH)4
H EttringiteCa6Al2(SO4)3(OH)12 · 26H2O
H HydrocalumiteCa4Al2(OH)12(Cl,CO3,OH)2 · 4H2O
H OkeniteCa10Si18O46 · 18H2O
H PectoliteNaCa2Si3O8(OH)
H PlombièriteCa5Si6O16(OH)2 · 7H2O
H PortlanditeCa(OH)2
H ScawtiteCa7(Si3O9)2CO3 · 2H2O
H TobermoriteCa5Si6O17 · 5H2O
H XonotliteCa6(Si6O17)(OH)2
CCarbon
C CalciteCaCO3
C HydrocalumiteCa4Al2(OH)12(Cl,CO3,OH)2 · 4H2O
C ScawtiteCa7(Si3O9)2CO3 · 2H2O
C SpurriteCa5(SiO4)2(CO3)
OOxygen
O AegirineNaFe3+Si2O6
O AfwilliteCa3[SiO4][SiO2(OH)2] · 2H2O
O ÅkermaniteCa2Mg[Si2O7]
O AnalcimeNa(AlSi2O6) · H2O
O AnorthiteCa(Al2Si2O8)
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O BredigiteCa7Mg(SiO4)4
O CalciteCaCO3
O CebolliteCa5Al2(SiO4)3(OH)4
O DiopsideCaMgSi2O6
O EttringiteCa6Al2(SO4)3(OH)12 · 26H2O
O FerrobustamiteCaFe2+(Si2O6)
O GehleniteCa2Al[AlSiO7]
O HydrocalumiteCa4Al2(OH)12(Cl,CO3,OH)2 · 4H2O
O Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
O LarniteCa2SiO4
O MagnetiteFe2+Fe23+O4
O OkeniteCa10Si18O46 · 18H2O
O PectoliteNaCa2Si3O8(OH)
O PerovskiteCaTiO3
O PlombièriteCa5Si6O16(OH)2 · 7H2O
O PortlanditeCa(OH)2
O QuartzSiO2
O RankiniteCa3Si2O7
O ScawtiteCa7(Si3O9)2CO3 · 2H2O
O SpinelMgAl2O4
O SpurriteCa5(SiO4)2(CO3)
O TitaniteCaTi(SiO4)O
O TobermoriteCa5Si6O17 · 5H2O
O WollastoniteCa3(Si3O9)
O XonotliteCa6(Si6O17)(OH)2
O Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
O Pyroxene GroupADSi2O6
O Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
O Melilite GroupCa2M(XSiO7)
NaSodium
Na AegirineNaFe3+Si2O6
Na AnalcimeNa(AlSi2O6) · H2O
Na Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Na PectoliteNaCa2Si3O8(OH)
Na Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Na Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
MgMagnesium
Mg ÅkermaniteCa2Mg[Si2O7]
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mg BredigiteCa7Mg(SiO4)4
Mg DiopsideCaMgSi2O6
Mg SpinelMgAl2O4
Mg Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
AlAluminium
Al AnalcimeNa(AlSi2O6) · H2O
Al AnorthiteCa(Al2Si2O8)
Al CebolliteCa5Al2(SiO4)3(OH)4
Al EttringiteCa6Al2(SO4)3(OH)12 · 26H2O
Al GehleniteCa2Al[AlSiO7]
Al HydrocalumiteCa4Al2(OH)12(Cl,CO3,OH)2 · 4H2O
Al Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Al SpinelMgAl2O4
Al Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Al Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
SiSilicon
Si AegirineNaFe3+Si2O6
Si AfwilliteCa3[SiO4][SiO2(OH)2] · 2H2O
Si ÅkermaniteCa2Mg[Si2O7]
Si AnalcimeNa(AlSi2O6) · H2O
Si AnorthiteCa(Al2Si2O8)
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si BredigiteCa7Mg(SiO4)4
Si CebolliteCa5Al2(SiO4)3(OH)4
Si DiopsideCaMgSi2O6
Si FerrobustamiteCaFe2+(Si2O6)
Si GehleniteCa2Al[AlSiO7]
Si Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Si LarniteCa2SiO4
Si OkeniteCa10Si18O46 · 18H2O
Si PectoliteNaCa2Si3O8(OH)
Si PlombièriteCa5Si6O16(OH)2 · 7H2O
Si QuartzSiO2
Si RankiniteCa3Si2O7
Si ScawtiteCa7(Si3O9)2CO3 · 2H2O
Si SpurriteCa5(SiO4)2(CO3)
Si TitaniteCaTi(SiO4)O
Si TobermoriteCa5Si6O17 · 5H2O
Si WollastoniteCa3(Si3O9)
Si XonotliteCa6(Si6O17)(OH)2
Si Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Si Pyroxene GroupADSi2O6
Si Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
Si Melilite GroupCa2M(XSiO7)
SSulfur
S EttringiteCa6Al2(SO4)3(OH)12 · 26H2O
ClChlorine
Cl HydrocalumiteCa4Al2(OH)12(Cl,CO3,OH)2 · 4H2O
CaCalcium
Ca AfwilliteCa3[SiO4][SiO2(OH)2] · 2H2O
Ca ÅkermaniteCa2Mg[Si2O7]
Ca AnorthiteCa(Al2Si2O8)
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca BredigiteCa7Mg(SiO4)4
Ca CalciteCaCO3
Ca CebolliteCa5Al2(SiO4)3(OH)4
Ca DiopsideCaMgSi2O6
Ca EttringiteCa6Al2(SO4)3(OH)12 · 26H2O
Ca FerrobustamiteCaFe2+(Si2O6)
Ca GehleniteCa2Al[AlSiO7]
Ca HydrocalumiteCa4Al2(OH)12(Cl,CO3,OH)2 · 4H2O
Ca Anorthite var. Labradorite(Ca,Na)[Al(Al,Si)Si2O8]
Ca LarniteCa2SiO4
Ca OkeniteCa10Si18O46 · 18H2O
Ca PectoliteNaCa2Si3O8(OH)
Ca PerovskiteCaTiO3
Ca PlombièriteCa5Si6O16(OH)2 · 7H2O
Ca PortlanditeCa(OH)2
Ca RankiniteCa3Si2O7
Ca ScawtiteCa7(Si3O9)2CO3 · 2H2O
Ca SpurriteCa5(SiO4)2(CO3)
Ca TitaniteCaTi(SiO4)O
Ca TobermoriteCa5Si6O17 · 5H2O
Ca WollastoniteCa3(Si3O9)
Ca XonotliteCa6(Si6O17)(OH)2
Ca Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Ca Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
Ca Melilite GroupCa2M(XSiO7)
TiTitanium
Ti PerovskiteCaTiO3
Ti TitaniteCaTi(SiO4)O
Ti Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6
FeIron
Fe AegirineNaFe3+Si2O6
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe FerrobustamiteCaFe2+(Si2O6)
Fe MagnetiteFe2+Fe23+O4
Fe Augite var. Titanium-bearing Augite(Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Scawt_Hill
Wikidata ID:Q7430650

Other Regions, Features and Areas containing this locality

British and Irish IslesGroup of Islands
Eurasian PlateTectonic Plate
EuropeContinent
North Atlantic Igneous ProvinceLarge Igneous Province
UK

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.

References

Murdoch, Joseph (1955) Scawtite from Crestmore, California. American Mineralogist, 40 (5-6). 505-509 (referring to scawtite from the type locality (Tilley and Hey, 1930))
 
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