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Petrogale Cave, Madura Roadhouse, Dundas Shire, Western Australia, Australiai
Regional Level Types
Petrogale CaveCave
Madura Roadhouse- not defined -
Dundas ShireShire
Western AustraliaState
AustraliaCountry

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Key
Latitude & Longitude (WGS84):
31° 52' 9'' South , 127° 23' 19'' East
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:


Petrogale is the genus name for rock wallaby.

The cave is 36 kilometres east of the Madura roadhouse on the edge of the scarp. It appears would be difficult to find, forming only a small sinkhole on the surface before opening out into a chamber further in.

The cave was discovered by a Western Australian Museum expedition in 1973. The new species archerite had been found at Murra-el-Evelyn Cave, but not in sufficient quantities to make a positive identification. A search was then undertaken for other caves which could contain the species.

On the way back to Perth, the landrover was wrecked in a rollover, Bridge bemoaning the damage to his specimens.

Once through the narrow sinkhole, it opens into a chamber with old calcite decorations. The mineralization was found at the far end of the cave, through several long chambers and tight clefts. Bats are wonderful creatures but keep a messy home. The species were formed from guano of the chalinolobus morio bat, which only a few were seen, but possibly more inhabit the cave seasonally. The floor of the cave was covered in dry guano dust, as any fresh material is devoured by coprophagic insects.

The walls show convoluted crusts and stalactites of the minerals. The stalactites are mainly composed of biphosphammite, with some other minerals (except calcite and guanine), where they join the wall or ceiling. Some stalactites are composed mainly of aphthitalite.

Archerite was found in only a few samples as small tetragonal crystals to 2mm long, and buff to clear coloured crusts, associated with biphosphammite, aphthitalite and guanine.

Mundrabillaite is named after the pastoral station on which the caves are located, and was discovered during Peter Bridge's 1977 visit, but only studied and IMA approved in 1983. It comes as tiny crystals associated with archerite, bisphosphammite, aphthitalite, halite, syngenite, stercorite, newberyite, calcite, and an unknown phosphate. The crystals are colourless, with an earthy lustre, white streak, soft and fragile.

At the surface it forms only a minor sinkhole, and there appears no easy access to the location.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


14 valid minerals. 2 (TL) - type locality of 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:

Aphthitalite
Formula: (K,Na)3Na(SO4)2
Reference: Mineralogical Magazine (1977): 41: 33-35.
Archerite (TL)
Formula: (K,NH4)(H2PO4)
Type Locality:
Reference: Mineralogical Magazine (1977): 41: 33-35.
Biphosphammite
Formula: NH4(H2PO4)
Reference: Mineralogical Magazine (1977): 41: 33-35.
Calcite
Formula: CaCO3
Reference: Mineralogical Magazine (1977): 41: 33-35.
Guanine
Formula: C5H5N5O
Reference: Mineralogical Magazine (1977): 41: 33-35.
Halite
Formula: NaCl
Reference: Mineralogical Magazine (1977): 41: 33-35.
Mundrabillaite (TL)
Formula: (NH4)2Ca(HPO4)2 · H2O
Type Locality:
Reference: Mineralogical Magazine (1983): 47, 80-81.
Newberyite
Formula: Mg(HPO4) · 3H2O
Reference: Mineralogical Magazine (1977): 41: 33-35.
Oxammite
Formula: (NH4)2(C2O4) · H2O
Reference: Mineralogical Magazine (1977): 41: 33-35.
Phoxite
Formula: (NH4)2Mg2(C2O4)(PO3OH)2(H2O)4
Reference: Kampf, A. R., Celestian, A. J., Nash, B. P., & Marty, J. (2019). Phoxite,(NH4) 2Mg2 (C2O4)(PO3OH) 2 (H2O) 4, the first phosphate-oxalate mineral. American Mineralogist, 104(7), 973-979.
Stercorite
Formula: Na(NH4)HPO4 · 4H2O
Reference: Mineralogical Magazine (1977): 41: 33-35.
Syngenite
Formula: K2Ca(SO4)2 · H2O
Reference: Mineralogical Magazine (1977): 41: 33-35.
Weddellite
Formula: Ca(C2O4) · (2.5-x)H2O
Reference: Mineralogical Magazine (1977): 41: 33-35.
Whitlockite
Formula: Ca9Mg(PO4)6(HPO4)
Reference: Mineralogical Magazine (1977): 41: 33-35.

List of minerals arranged by Strunz 10th Edition classification

Group 3 - Halides
Halite3.AA.20NaCl
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Aphthitalite7.AC.35(K,Na)3Na(SO4)2
Syngenite7.CD.35K2Ca(SO4)2 · H2O
Group 8 - Phosphates, Arsenates and Vanadates
Archerite (TL)8.AD.15(K,NH4)(H2PO4)
Biphosphammite8.AD.15NH4(H2PO4)
Mundrabillaite (TL)8.CJ.10(NH4)2Ca(HPO4)2 · H2O
Newberyite8.CE.10Mg(HPO4) · 3H2O
Stercorite8.CJ.05Na(NH4)HPO4 · 4H2O
Whitlockite8.AC.45Ca9Mg(PO4)6(HPO4)
Group 10 - Organic Compounds
Guanine10.CA.30C5H5N5O
Oxammite10.AB.55(NH4)2(C2O4) · H2O
Weddellite10.AB.40Ca(C2O4) · (2.5-x)H2O
Unclassified Minerals, Rocks, etc.
Phoxite-(NH4)2Mg2(C2O4)(PO3OH)2(H2O)4

List of minerals arranged by Dana 8th Edition classification

Group 9 - NORMAL HALIDES
AX
Halite9.1.1.1NaCl
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 28 - ANHYDROUS ACID AND NORMAL SULFATES
A2XO4
Aphthitalite28.2.2.1(K,Na)3Na(SO4)2
Group 29 - HYDRATED ACID AND NORMAL SULFATES
A2B(XO4)2·xH2O
Syngenite29.3.1.1K2Ca(SO4)2 · H2O
Group 37 - ANHYDROUS ACID PHOSPHATES, ARSENATES AND VANADATES
Miscellaneous
Archerite (TL)37.1.4.2(K,NH4)(H2PO4)
Biphosphammite37.1.4.1NH4(H2PO4)
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
(AB)3(XO4)2
Whitlockite38.3.4.1Ca9Mg(PO4)6(HPO4)
Group 39 - HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
A[HXO4]·xH2O
Newberyite39.1.6.1Mg(HPO4) · 3H2O
Miscellaneous
Mundrabillaite (TL)39.3.3.1(NH4)2Ca(HPO4)2 · H2O
Stercorite39.3.1.1Na(NH4)HPO4 · 4H2O
Group 50 - ORGANIC COMPOUNDS
Oxalates
Oxammite50.1.5.(NH4)2(C2O4) · H2O
Weddellite50.1.2.1Ca(C2O4) · (2.5-x)H2O
Miscellaneous
Guanine50.4.5.1C5H5N5O
Unclassified Minerals, Mixtures, etc.
Phoxite-(NH4)2Mg2(C2O4)(PO3OH)2(H2O)4

List of minerals for each chemical element

HHydrogen
H Archerite(K,NH4)(H2PO4)
H Mundrabillaite(NH4)2Ca(HPO4)2 · H2O
H GuanineC5H5N5O
H NewberyiteMg(HPO4) · 3H2O
H Oxammite(NH4)2(C2O4) · H2O
H StercoriteNa(NH4)HPO4 · 4H2O
H SyngeniteK2Ca(SO4)2 · H2O
H WeddelliteCa(C2O4) · (2.5-x)H2O
H WhitlockiteCa9Mg(PO4)6(HPO4)
H BiphosphammiteNH4(H2PO4)
H Phoxite(NH4)2Mg2(C2O4)(PO3OH)2(H2O)4
CCarbon
C CalciteCaCO3
C GuanineC5H5N5O
C Oxammite(NH4)2(C2O4) · H2O
C WeddelliteCa(C2O4) · (2.5-x)H2O
C Phoxite(NH4)2Mg2(C2O4)(PO3OH)2(H2O)4
NNitrogen
N Mundrabillaite(NH4)2Ca(HPO4)2 · H2O
N GuanineC5H5N5O
N Oxammite(NH4)2(C2O4) · H2O
N StercoriteNa(NH4)HPO4 · 4H2O
N BiphosphammiteNH4(H2PO4)
N Phoxite(NH4)2Mg2(C2O4)(PO3OH)2(H2O)4
OOxygen
O Archerite(K,NH4)(H2PO4)
O Mundrabillaite(NH4)2Ca(HPO4)2 · H2O
O Aphthitalite(K,Na)3Na(SO4)2
O CalciteCaCO3
O GuanineC5H5N5O
O NewberyiteMg(HPO4) · 3H2O
O Oxammite(NH4)2(C2O4) · H2O
O StercoriteNa(NH4)HPO4 · 4H2O
O SyngeniteK2Ca(SO4)2 · H2O
O WeddelliteCa(C2O4) · (2.5-x)H2O
O WhitlockiteCa9Mg(PO4)6(HPO4)
O BiphosphammiteNH4(H2PO4)
O Phoxite(NH4)2Mg2(C2O4)(PO3OH)2(H2O)4
NaSodium
Na Aphthitalite(K,Na)3Na(SO4)2
Na HaliteNaCl
Na StercoriteNa(NH4)HPO4 · 4H2O
MgMagnesium
Mg NewberyiteMg(HPO4) · 3H2O
Mg WhitlockiteCa9Mg(PO4)6(HPO4)
Mg Phoxite(NH4)2Mg2(C2O4)(PO3OH)2(H2O)4
PPhosphorus
P Archerite(K,NH4)(H2PO4)
P Mundrabillaite(NH4)2Ca(HPO4)2 · H2O
P NewberyiteMg(HPO4) · 3H2O
P StercoriteNa(NH4)HPO4 · 4H2O
P WhitlockiteCa9Mg(PO4)6(HPO4)
P BiphosphammiteNH4(H2PO4)
P Phoxite(NH4)2Mg2(C2O4)(PO3OH)2(H2O)4
SSulfur
S Aphthitalite(K,Na)3Na(SO4)2
S SyngeniteK2Ca(SO4)2 · H2O
ClChlorine
Cl HaliteNaCl
KPotassium
K Archerite(K,NH4)(H2PO4)
K Aphthitalite(K,Na)3Na(SO4)2
K SyngeniteK2Ca(SO4)2 · H2O
CaCalcium
Ca Mundrabillaite(NH4)2Ca(HPO4)2 · H2O
Ca CalciteCaCO3
Ca SyngeniteK2Ca(SO4)2 · H2O
Ca WeddelliteCa(C2O4) · (2.5-x)H2O
Ca WhitlockiteCa9Mg(PO4)6(HPO4)

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Bridge, P.J. (1977): Archerite (K,NH4)H2PO4- a new mineral from Madura, Mineralogical Magazine (Mar 1977):41: 33-35
Bridge, P.J., Robinson, B.W. (1983), Mundrabillaite- a new cave mineral from Western Australia, Mineralogical Magazine, Volume 47, pp80-81, March 1983

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