Sedimentary Rocks in Pakistan
Sedimentary rocks in Pakistan range in age from Precambrian to Miocene i.e from oldest to youngest on the geological time scale form 542 million years to latest. Luckily for geoscientists all of them are exposed in different parts of the country. Lithologically they constitute sandstone, limestone, shale and mixed lithologies of them all. These rocks are exposed all along the mountain ranges from Islamabad in north to Karachi in the south.
Igneous rocks are exposed north of Peshawar or only at Nagarparker in the southeastern corner of the country.
You better study 'Stratigraphy and historical geology of Pakistan' by Kazmi and Abbasi (2008), which will provide you a full knowledge about the rocks in Pakistan. 'Geology and tectonics of Pakistan' by Kazmi and Jan (1997) also gives details of distribution of ores and minerals in different parts of the country.
Names
[de] Mergel
[en] marl
Description
Marl is a sedimentary rock made of clay and limestone, which belongs to the family of pelitic rocks (clays <0.02 mm, the fine particles in water sales) and a carbonate is a variety of mudstone. The rocks can be both clastic and chemical-biogenic origin.
The carbonate can be washed in as detritus, often goes back to the carbonate skeletons of plankton or biochemically precipitated calcite.
On the seabed to collect layers of calcite and clay sediments, which are becoming more powerful over time and compacted by the weight of younger sediments onlay. Furthermore, responding in the sediment pore solution with the mineral matter and the sediment is gradually changing into a rock.
The trivial term ruin marble (also landscape marble) refers to limestone and marl (as calcitic overprinted mud stones).
Color
green, brown, beige and gray - grayish white
Grain Size very fine grained sandstone are deposit in southern California Igneous Rock Igneous rocks are formed when molten rock (magma) cools and solidifies, with or without crystallization, either below
Igneous rocks are exposed north of Peshawar or only at Nagarparker in the southeastern corner of the country.
You better study 'Stratigraphy and historical geology of Pakistan' by Kazmi and Abbasi (2008), which will provide you a full knowledge about the rocks in Pakistan. 'Geology and tectonics of Pakistan' by Kazmi and Jan (1997) also gives details of distribution of ores and minerals in different parts of the country.
Names
[de] Mergel
[en] marl
Description
Marl is a sedimentary rock made of clay and limestone, which belongs to the family of pelitic rocks (clays <0.02 mm, the fine particles in water sales) and a carbonate is a variety of mudstone. The rocks can be both clastic and chemical-biogenic origin.
The carbonate can be washed in as detritus, often goes back to the carbonate skeletons of plankton or biochemically precipitated calcite.
On the seabed to collect layers of calcite and clay sediments, which are becoming more powerful over time and compacted by the weight of younger sediments onlay. Furthermore, responding in the sediment pore solution with the mineral matter and the sediment is gradually changing into a rock.
The trivial term ruin marble (also landscape marble) refers to limestone and marl (as calcitic overprinted mud stones).
Color
green, brown, beige and gray - grayish white
Grain Size very fine grained sandstone are deposit in southern California Igneous Rock Igneous rocks are formed when molten rock (magma) cools and solidifies, with or without crystallization, either below