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Olivers Road, Gads Hill, Upper Mersey Valley, Meander Valley municipality, Tasmania, Australiai
Regional Level Types
Olivers RoadRoad
Gads HillHill
Upper Mersey ValleyValley
Meander Valley municipalityMunicipality

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Latitude & Longitude (WGS84): 41° 33' 57'' South , 146° 13' 13'' East
Latitude & Longitude (decimal): -41.56605,146.22030
GeoHash:G#: r0xgx34kh
Locality type:Road
Köppen climate type:Cfb : Temperate oceanic climate

This area has a thick sequence of Paleogene basalts, with some highly vesicular zones in the lower parts (Sutherland and Bottrill, 2005).

The best known site is on the eastern side of the hill along the Mole Creek to Sheffield highway alongside a scenic lookout, and is the locality documented by Andersen (1984). It is here that vesicles many metres across have produced specimens with large chabazite- Ca crystals. Chabazite-Na as herschelite has also been reported from Gads Hill (Sutherland and Bottrill, 2005).

Two occurrences of note were reported by Andersen, one, a cavern measuring 8 metres by 3 metres by 1 metre, the second, 5 metres by 2 metres by 1 metre. Phillipsite, thomsonite and calcite occurred with the chabazite in these vesicles. Rare levyne was also recorded from this locality, the first reported occurrence of this mineral in Tasmania.

Other minerals recorded by Andersen include apophyllite, nontronite, tacharanite and tobermorite. It is still possible to collect specimens from the boulders on the eastern side of the road, but the area is quite overgrown and leeches are common.

Regions containing this locality

Australian Plate (Australia Plate)Plate
Delamerian Orogen, AustraliaOrogen
Thylacine Province, Tasmania, AustraliaGeologic Province

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

2 valid minerals.

List of minerals arranged by Strunz 10th Edition classification

Group 5 - Nitrates and Carbonates
Group 9 - Silicates
Analcime9.GB.05Na(AlSi2O6) · H2O
Unclassified Minerals, Rocks, etc.

List of minerals arranged by Dana 8th Edition classification

Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Analcime77.1.1.1Na(AlSi2O6) · H2O
Unclassified Minerals, Mixtures, etc.

List of minerals for each chemical element

H AnalcimeNa(AlSi2O6) · H2O
C CalciteCaCO3
O AnalcimeNa(AlSi2O6) · H2O
O CalciteCaCO3
Na AnalcimeNa(AlSi2O6) · H2O
Al AnalcimeNa(AlSi2O6) · H2O
Si AnalcimeNa(AlSi2O6) · H2O
Ca CalciteCaCO3


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Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Sutherland, F.L., Bottrill, R.S. (2005) Zeolites of western Tasmania. Australian Journal of Mineralogy 10:2, 59-72.
Andersen, P., 1984. Zeolites from Gads Hill, Tasmania. Australian Mineralogist. 47, p. 279-

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