Bottrill, R.S. and Unwin, L., (2020) MINERALOGICAL, PETROLOGICAL AND GEOCHEMICAL ANALYSES, SKILLION HILL, ROKEBY. Mineral Resources Tasmania Laboratory Report LJN2018-074

ⓘ Calcite

Formula: CaCO₃

Locality: Hanson’s Flagstaff Gully quarry, Flagstaff Gully, Clarence city, Tasmania, Australia

ⓘ 'Clay minerals'

Locality: Skillion Hill, Clarence city, Tasmania, Australia

ⓘ 'Clinopyroxene Subgroup'

Locality: Skillion Hill, Clarence city, Tasmania, Australia

ⓘ 'Fayalite-Forsterite Series'

Locality: Skillion Hill, Clarence city, Tasmania, Australia

ⓘ Halite

Formula: NaCl

References:

Steve Sorrell CollectionIdentified by Steve Sorrell: Visual Identification

ⓘ Halloysite

Formula: Al₂(Si₂O₅)(OH)₄

Locality: Skillion Hill, Clarence city, Tasmania, Australia

ⓘ Hematite

Formula: Fe₂O₃

Locality: Skillion Hill, Clarence city, Tasmania, Australia

ⓘ 'Iddingsite'

Formula: MgO · Fe₂O₃ · 3SiO₂ · 4H₂O

Locality: Skillion Hill, Clarence city, Tasmania, Australia

ⓘ Ilmenite

Formula: Fe²⁺TiO₃

Locality: Skillion Hill, Clarence city, Tasmania, Australia

ⓘ Kaolinite

Formula: Al₂(Si₂O₅)(OH)₄

Locality: Skillion Hill, Clarence city, Tasmania, Australia

ⓘ Laumontite

Formula: CaAl₂Si₄O₁₂ · 4H₂O

Locality: Hanson’s Flagstaff Gully quarry, Flagstaff Gully, Clarence city, Tasmania, Australia

ⓘ Magnetite

Formula: Fe²⁺Fe³⁺₂O₄

Locality: Skillion Hill, Clarence city, Tasmania, Australia

ⓘ Nepheline

Formula: Na₃K(Al₄Si₄O₁₆)

Locality: Skillion Hill, Clarence city, Tasmania, Australia

ⓘ Opal

Formula: SiO₂ · nH₂O

Locality: Shag Bay, Risdon, Clarence City, Tasmania, Australia

ⓘ 'Orthopyroxene Subgroup'

Locality: Skillion Hill, Clarence city, Tasmania, Australia

ⓘ 'Plagioclase'

Formula: (Na,Ca)[(Si,Al)AlSi₂]O₈

Locality: Skillion Hill, Clarence city, Tasmania, Australia

ⓘ Pyrite

Formula: FeS₂

Locality: Hanson’s Flagstaff Gully quarry, Flagstaff Gully, Clarence city, Tasmania, Australia

ⓘ Quartz

Formula: SiO₂

Locality: Skillion Hill, Clarence city, Tasmania, Australia

ⓘ Quartz var. Chalcedony

Formula: SiO₂

Locality: Skillion Hill, Clarence city, Tasmania, Australia

ⓘ Sanidine

Formula: K(AlSi₃O₈)

Locality: Skillion Hill, Clarence city, Tasmania, Australia

ⓘ 'Smectite Group'

Formula: A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O

Locality: Skillion Hill, Clarence city, Tasmania, Australia

ⓘ Tridymite

Formula: SiO₂

Locality: Skillion Hill, Clarence city, Tasmania, Australia

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘ	Pyrite	2.EB.05a	FeS₂
Group 3 - Halides
ⓘ	Halite	3.AA.20	NaCl
Group 4 - Oxides and Hydroxides
ⓘ	Magnetite	4.BB.05	Fe²⁺Fe³⁺₂O₄
ⓘ	Hematite	4.CB.05	Fe₂O₃
ⓘ	Ilmenite	4.CB.05	Fe²⁺TiO₃
ⓘ	Quartz var. Chalcedony	4.DA.05	SiO₂
ⓘ		4.DA.05	SiO₂
ⓘ	Opal	4.DA.10	SiO₂ · nH₂O
ⓘ	Tridymite	4.DA.10	SiO₂
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
Group 9 - Silicates
ⓘ	Augite	9.DA.15	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
ⓘ	Aegirine-augite	9.DA.20	(Na_aCa_bFe²⁺_cMg_d)(Fe³⁺_eAl_fFe²⁺_gMg_h)Si₂O₆
ⓘ	Kaolinite	9.ED.05	Al₂(Si₂O₅)(OH)₄
ⓘ	Halloysite	9.ED.10	Al₂(Si₂O₅)(OH)₄
ⓘ	Nepheline	9.FA.05	Na₃K(Al₄Si₄O₁₆)
ⓘ	Sanidine	9.FA.30	K(AlSi₃O₈)
ⓘ	Albite	9.FA.35	Na(AlSi₃O₈)
ⓘ	var. Anorthoclase	9.FA.35	(Na,K)AlSi₃O₈
ⓘ	Laumontite	9.GB.10	CaAl₂Si₄O₁₂ · 4H₂O
Unclassified
ⓘ	'Clay minerals'	-
ⓘ	'Iddingsite'	-	MgO · Fe₂O₃ · 3SiO₂ · 4H₂O
ⓘ	'Clinopyroxene Subgroup'	-
ⓘ	'Fayalite-Forsterite Series'	-
ⓘ	'Plagioclase'	-	(Na,Ca)[(Si,Al)AlSi₂]O₈
ⓘ	'Orthopyroxene Subgroup'	-
ⓘ	'Smectite Group'	-	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Halloysite	Al₂(Si₂O₅)(OH)₄
H	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
H	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
H	ⓘ Opal	SiO₂ · nH₂O
H	ⓘ Iddingsite	MgO · Fe₂O₃ · 3SiO₂ · 4H₂O
H	ⓘ Smectite Group	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O
C	Carbon
C	ⓘ Calcite	CaCO₃
O	Oxygen
O	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
O	ⓘ Albite	Na(AlSi₃O₈)
O	ⓘ Albite var. Anorthoclase	(Na,K)AlSi₃O₈
O	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
O	ⓘ Calcite	CaCO₃
O	ⓘ Quartz var. Chalcedony	SiO₂
O	ⓘ Halloysite	Al₂(Si₂O₅)(OH)₄
O	ⓘ Hematite	Fe₂O₃
O	ⓘ Ilmenite	Fe²⁺TiO₃
O	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
O	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
O	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
O	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
O	ⓘ Opal	SiO₂ · nH₂O
O	ⓘ Quartz	SiO₂
O	ⓘ Sanidine	K(AlSi₃O₈)
O	ⓘ Tridymite	SiO₂
O	ⓘ Iddingsite	MgO · Fe₂O₃ · 3SiO₂ · 4H₂O
O	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
O	ⓘ Smectite Group	A_0.3D_2-3[T₄O₁₀]Z₂ · nH₂O
Na	Sodium
Na	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Na	ⓘ Albite	Na(AlSi₃O₈)
Na	ⓘ Albite var. Anorthoclase	(Na,K)AlSi₃O₈
Na	ⓘ Halite	NaCl
Na	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Na	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Mg	Magnesium
Mg	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Mg	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Mg	ⓘ Iddingsite	MgO · Fe₂O₃ · 3SiO₂ · 4H₂O
Al	Aluminium
Al	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Al	ⓘ Albite	Na(AlSi₃O₈)
Al	ⓘ Albite var. Anorthoclase	(Na,K)AlSi₃O₈
Al	ⓘ Halloysite	Al₂(Si₂O₅)(OH)₄
Al	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
Al	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Al	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Al	ⓘ Sanidine	K(AlSi₃O₈)
Al	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Si	Silicon
Si	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Si	ⓘ Albite	Na(AlSi₃O₈)
Si	ⓘ Albite var. Anorthoclase	(Na,K)AlSi₃O₈
Si	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Si	ⓘ Quartz var. Chalcedony	SiO₂
Si	ⓘ Halloysite	Al₂(Si₂O₅)(OH)₄
Si	ⓘ Kaolinite	Al₂(Si₂O₅)(OH)₄
Si	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Si	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
Si	ⓘ Opal	SiO₂ · nH₂O
Si	ⓘ Quartz	SiO₂
Si	ⓘ Sanidine	K(AlSi₃O₈)
Si	ⓘ Tridymite	SiO₂
Si	ⓘ Iddingsite	MgO · Fe₂O₃ · 3SiO₂ · 4H₂O
Si	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
S	Sulfur
S	ⓘ Pyrite	FeS₂
Cl	Chlorine
Cl	ⓘ Halite	NaCl
K	Potassium
K	ⓘ Albite var. Anorthoclase	(Na,K)AlSi₃O₈
K	ⓘ Nepheline	Na₃K(Al₄Si₄O₁₆)
K	ⓘ Sanidine	K(AlSi₃O₈)
Ca	Calcium
Ca	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Ca	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Laumontite	CaAl₂Si₄O₁₂ · 4H₂O
Ca	ⓘ Plagioclase	(Na,Ca)[(Si,Al)AlSi₂]O₈
Ti	Titanium
Ti	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	Iron
Fe	ⓘ Aegirine-augite	(Na_aCa_bFe_c²⁺Mg_d)(Fe_e³⁺Al_fFe_g²⁺Mg_h)Si₂O₆
Fe	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Fe	ⓘ Hematite	Fe₂O₃
Fe	ⓘ Ilmenite	Fe²⁺TiO₃
Fe	ⓘ Magnetite	Fe²⁺Fe₂³⁺O₄
Fe	ⓘ Pyrite	FeS₂
Fe	ⓘ Iddingsite	MgO · Fe₂O₃ · 3SiO₂ · 4H₂O

Fossils

There are 4 fossil localities from the PaleoBioDB database within this region.

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Occurrences

Youngest Fossil Listed

23.0 Ma (Oligocene)

Oldest Fossil Listed

279 Ma (Permian)

Stratigraphic Units

Unit	No. Occurrences	Age
Knocklofty	1	252.17 - 251.2 Ma (Phanerozoic)
Ferntree	12	268.8 - 265.1 Ma (Permian)
West Arm	1	279.3 - 272.3 Ma (Permian)
Deep Bay	1	279.3 - 272.3 Ma (Permian)

Fossil Localities

Click to show 4 fossil localities

Australia

Tasmania
- Clarence city
  - Cenozoic🐚 Geilston Bay Derwent
  - Permian🐚 Grasstree Hill
  - Phanerozoic🐚 Milford
  - Permian🐚 UQ L3061

Other Databases

GeoNames ID:	7839356

Localities in this Region

Australia

Tasmania
- Clarence city
  - Flagstaff Gully
    - Hanson’s Flagstaff Gully quarry
  - Risdon
    - Risdon Brook Dam
    - Shag Bay
  - Skillion Hill

Other Regions, Features and Areas that Intersect

Australia

Delamerian OrogenOrogen
Tasmania
- Tasmania BasinBasin
- Thylacine ProvinceGeologic Province

Australian PlateTectonic Plate

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