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| Cambrian |
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Goldie Chert: Cambrian Goldie Chert sample from View Hill quarry.
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Chrysoprase: Corduroy Creek Gabbro largely replaced by green chrysoprase, Waratah Bay.
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Corea Ck schist: Schist of sillimanite zone in the Glenelg River Metamorphic Complex, Corea Creek.
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Pegfold: Tightly folded pegmatite dyke intruding sillimanite zone schist, Glenelg River Metamorphic Complex, Yarramyljup Creek.
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Moornambool: Complexly folded schist of the Moornambool Metamorphic Complex, Mt Ararat.
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Mt Dryden: Dacite breccia at Mt Dryden, part of the Mt Stavely Volcanic Complex of calc-alkaline volcanics.
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| Ordovician |
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I victoriae: Isograptus victoriae (Early Ordovician) from near Bendigo.
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Fold Steiglitz: Folds in the Ordovician Castlemaine Group, Steiglitz.
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Mallacoota: Tightly folded Early Ordovician chert and sandstone at Mallacoota.
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Morrisons: Tightly folded turbidites of the Ordovician Castlemaine Group, Morrisons near Ballarat.
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Steiglitz concretion: Calcareous concretion about 50 cm long, in Early Ordovician Castlemaine Group, Steiglitz.
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Syncline in Pinnak: Rounded syncline hinge in Early Ordovician Pinnak Sandstone, near Mt Hotham.
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| Silurian |
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Cordierite schist: Cordierite porphyroblasts in a mica schist (knotted schist) from near Mount Wills, Omeo Metamorphic Complex.
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Calc-silicate enclave in migmatite: Migmatite of the Omeo Metamorphic Complex near Mount Beauty. Just below the hammer is a calc-silicate enclave.
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Pretty Valley Tonalite: Foliated Pretty Valley Tonalite at Pretty Valley Dam, Falls Creek.
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Black Range: Aeolian cross-bedded quartz sandstone of the Grampians Group, Black Range.
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Baragwanathia: Silurian Wilson Creek Shale, Melbourne Zone, with the graptolite Monograptus thomasii (top left) and the early land plant Baragwanathia longifolia. West of Woods Point.
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Greensborough: Thrust fault, with folding in the footwall, in Silurian Melbourne Formation, Greensborough.
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Mt Abrupt: Looking north from Mt Sturgeon to Mt Abrupt, a cuesta developed on west-dipping quartzose sandstone of the Grampians Group.
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| Devonian |
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Bell Point Limestone: Folded Bell Point Limestone (Early Devonian) at Waratah Bay.
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The Basin Chert: Buchan Caves Limestone coquina that has been largely replaced by quartz and hematite.
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Paradise Falls: Late Devonian Mount Kent Conglomerate exposed at Paradise Falls north of Mansfield.
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Mt Buffalo: The Mount Buffalo Granite forms the Mount Buffalo plateau, seen here from Mt Hotham. Rocks in the foreground are Early Ordovician Pinnak Sandstone.
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Cathedral: The Cathedral, a large tor castle on Mount Buffalo.
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Folds Skyline Rd: Early Devonian Norton Gully Sandstone, folded during the Middle Devonian Tabberabberan Orogeny. Near Eildon.
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Liptrap: Folded Liptrap Formation (Early Devonian) at Cape Liptrap.
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Mt Hope: Late Devonian Pyramid Hill Granite at Mt Hope, showing flow-aligned K-feldspar phenocrysts, and small microgranitoid enclaves.
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Norton Gully Sandstone: Ripples in turbidites of the Early Devonian Norton Gully Sandstone, near Eildon.
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Porphyry dyke: Dyke of granophyric quartz-feldspar porphyry intruding the Nelse Shear Zone, Big River near Anglers Rest.
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Pyalong: Tors of Late Devonian Pyalong Granite, part of the Cobaw Batholith, near Pyalong.
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Razor & Viking: The Razor (left) and the Viking (right), two cuestas of the Late Devonian Avon Supergroup, looking north.
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Rocklands: Slab of Barangaroo Ignimbrite, of the early Devonian Rocklands Volcanic Group, showing tight flow folding of rheomorphic ignimbrite. Rocklands Dam.
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Spiral enclave train: Spiral train of enclaves in the Wilsons Promontory Granite, Norman Bay.
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Updated
May 27, 2009
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