SANDSTONE AND SHALE KAMPUNG BAWANG

Major Rock Type: Sedimentary Rock Formation: Crocker Formation Age: Upper Oligocene - Lower Miocene (27.8 - 15.9 million years ago) Origin: Kampung Bawang, Tamparuli * This is a compacted sandstone from Crocker Formation in Sabah. * The sample has very fine to fine grains of minerals, mostly accommodated by higher concentration of quartz. * The term compacted is used to show that the rock had underwent burial at certain depth in the Earth, resulting into removal of the air spaces (porosity) and increasing the density of the rock. * The mud drapes indicates the rock was deposited in a tidal environment, which is part of the marine shore that was submerged and then was exposed again, due to the rise and falls of the sea. * Commonly sandstone is widely used for construction industry

SANDSTONE AND SHALE, KOTA MARUDU SABAH

Major Rock Type: Sedimentary Rock Lithology: Shaly Sandstone Formation: Crocker Formation Age: Oligocene – Early Miocene (33.9 – 15.97 million years ago) Origin: Kota Marudu, Sabah * This is also a sandstone, originated from Crocker Formation, Sabah. * The rock has lighter grey in colour, slightly metamorphosed and do not preserved mud clasts or mud drapes as the previous sample. * The mudstone attached to this sandstone is showing flute cast structure, indicating that water had flowed on top of this rock deposition (perhaps was underneath stream/river)