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PERLOP IRON ORE
No full textRock Type: Sedimentary - Iron Ore
Lithology: Dolomite with Iron Ore
Age: Lower Devonian – Middle Permian (419 – 273 million years ago)
Origin: Perlop Quarry, Koperasi Kemajuan Tanah Perak Berhad, Chemor. Perak
* The features rock is called iron ore rock, due to their rich metallic iron found in the sedimentary rock mass.
* The ores are usually rich in iron oxides and vary in color from dark grey, bright yellow or deep purple to rusty re
PEGMATITE
No full textMajor Rock Type: Igneous
Formation: Jerai Formation
Age: Cambrian (540 - 485 million years ago)
Origin: Singkir Darat, Yan, Kedah
* This rock has been extracted from the Singkir Darat Quarry in Yan, Kedah, known as pegmatite, is a fascinating geological specimen with a unique composition and structure. It was dated that the age of this rock was from Cambrian Period, approximately 540 to 485 million years ago.
* Pegmatite is an igneous rock which has a mineral composition similar to granite. The predominant mineral constituents are quartz and feldspar, creating a beautiful interlocking of colours and textures.
* The quartz crystals, often translucent and colossal while the feldspar crystals exhibit a creamy white hue. These minerals are accompanied by the presence of mica minerals like muscovite and biotite, contributing their shiny, flaky appearance to the rock.
* The only difference is that pegmatite has larger sized minerals and these minerals can be easily observed in the pegmatite boulders.
* Pegmatite minerals grow to unusually large sizes due to the exceptionally slow cooling process during their formation, allowing crystals to reach several meters in length
