Looks similar to what has been labelled 'Marshmallow Rock' found near Mount Magnet. An exploration costean, 100 metres long, was dug on a north north-west trending dolerite dyke, 25 kilometres south-west of Beverley, 500 metres south of the Beverley-Westdale Road.

This revealed unusual mineralisation possibly caused by several successive dykes intersecting into the quartz-monzogranite country rock. The costean revealed grey to black dolerite, covered with cream to pale brown clinozoisite masses forming a 'snow-flake' pattern.

Examination of this showed the lighter areas as zoned sericite/muscovite, or clinozoisite/epidote phenocrysts 3 to 9 cms in diameter.

A few were slabbed and sold as specimens, although this was several decades ago, and are rarely seen now. It was marketed at the time as ' Cats Paw Rock'.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

ⓘ Clinozoisite

ⓘ Epidote

ⓘ Muscovite

ⓘ var. Sericite

3 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

ⓘ 'Dolerite'

Detailed Mineral List:

ⓘ Clinozoisite

Formula: {Ca₂}{Al₃}(Si₂O₇)(SiO₄)O(OH)

Reference: Fetherston, J.M. (2007) Dimension stone in Western Australia: Volume 1 — Industry review and dimension stones of the Southwest Region: Geological Survey of Western Australia, Mineral Resources Bulletin 23, 181p.

ⓘ Epidote

Formula: {Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)

ⓘ Muscovite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

ⓘ Muscovite var. Sericite

Formula: KAl₂(AlSi₃O₁₀)(OH)₂

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 9 - Silicates
ⓘ	Clinozoisite	9.BG.05a	{Ca₂}{Al₃}(Si₂O₇)(SiO₄)O(OH)
ⓘ	Epidote	9.BG.05a	{Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)
ⓘ	Muscovite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂
ⓘ	var. Sericite	9.EC.15	KAl₂(AlSi₃O₁₀)(OH)₂

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Clinozoisite	{Ca₂}{Al₃}(Si₂O₇)(SiO₄)O(OH)
H	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
H	ⓘ Epidote	{Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)
O	Oxygen
O	ⓘ Clinozoisite	{Ca₂}{Al₃}(Si₂O₇)(SiO₄)O(OH)
O	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
O	ⓘ Epidote	{Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)
Al	Aluminium
Al	ⓘ Clinozoisite	{Ca₂}{Al₃}(Si₂O₇)(SiO₄)O(OH)
Al	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Al	ⓘ Epidote	{Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)
Si	Silicon
Si	ⓘ Clinozoisite	{Ca₂}{Al₃}(Si₂O₇)(SiO₄)O(OH)
Si	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Si	ⓘ Epidote	{Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)
K	Potassium
K	ⓘ Muscovite var. Sericite	KAl₂(AlSi₃O₁₀)(OH)₂
K	ⓘ Muscovite	KAl₂(AlSi₃O₁₀)(OH)₂
Ca	Calcium
Ca	ⓘ Clinozoisite	{Ca₂}{Al₃}(Si₂O₇)(SiO₄)O(OH)
Ca	ⓘ Epidote	{Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)
Fe	Iron
Fe	ⓘ Epidote	{Ca₂}{Al₂Fe³⁺}(Si₂O₇)(SiO₄)O(OH)

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)

Fetherston, J.M. (2007) Dimension stone in Western Australia: Volume 1 — Industry review and dimension stones of the Southwest Region: Geological Survey of Western Australia, Mineral Resources Bulletin 23, 181p.

Other Regions, Features and Areas containing this locality

Australia

Western Australia
- West Australian ElementCraton
- Yilgarn CratonCraton

Australian PlateTectonic Plate

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