TECTONIC SETTING OF PAKISTAN
UPWARP zone
A broad anticline with gently sloping limbs formed as a result of differential uplift.
Zone of upwarp
Mari-Khandkot high
Jacobabad Khairpur high
-Thatta- Hyderabad high -Tharparkar high
DOWNWARP
A segment of the earth's crust that is broadly bent downward.
Zones of downwarp and platform slope -Northern Punjab monocline -Southern Punjab monocline -Cholistan shelf -Panno Aqil graben -Nawabshah slop -Lower Indus trough -Nabisar slope
The Jacobabad –Khairpur high divides the Indus Platform into two segments.
The lower segment is comprised of the Lower Indus trough.
It is bound by Nawabshah and Nabisar slopes, which are inturn flanked by Thatta-Hydterabad and Tharparkar highs.
The upper segment in Punjab is traversed by Sargodha-Shahpur ridge, splitting it into northern Punjab (Khushab-Gujranwala) monocline and southern Punjab (Mianwali-Bahawalpur) monocline and Cholistan shelf.
Westward, the Indus Platform sharply steepens to form the Sulaiman and Kirthar foredeeps. fore·deep [fawr-deep, fohr-] Show IPA noun Geology . an elongate sediment-filled sea-floor depression bordering an islandarc or other orogenic belt.
Foredeeps -Sulaiman Foredeep -Kirthar Foredeep
The Khuzdar Knot
This comprises a triangular tract about 75km long and 60km wide south of Kalat Plateau
This tract is comprised of hills and ranges in which strike changes abruptly and repeatedly from N-S to east-west or SW.
It consists of short, narrow, sinuous ridges and wide expanses of flat irregular basin plains occurring in between hills .
Altitude of the hills varies from 1800m to 2400m while that of hills varies between 1000 and 1500m.
The area is drained by the tributaries of the Mula and Kulachi rivers.
These basins are filled with tightly folded Cretaceous shale and thin limestone, uncomformably overlain by less deformed Kirthar Limestone.
The anticlinal axes trend in almost every direction from NE, NS to NW.
They are
A broad anticline with gently sloping limbs formed as a result of differential uplift.
Zone of upwarp
Mari-Khandkot high
Jacobabad Khairpur high
-Thatta- Hyderabad high -Tharparkar high
DOWNWARP
A segment of the earth's crust that is broadly bent downward.
Zones of downwarp and platform slope -Northern Punjab monocline -Southern Punjab monocline -Cholistan shelf -Panno Aqil graben -Nawabshah slop -Lower Indus trough -Nabisar slope
The Jacobabad –Khairpur high divides the Indus Platform into two segments.
The lower segment is comprised of the Lower Indus trough.
It is bound by Nawabshah and Nabisar slopes, which are inturn flanked by Thatta-Hydterabad and Tharparkar highs.
The upper segment in Punjab is traversed by Sargodha-Shahpur ridge, splitting it into northern Punjab (Khushab-Gujranwala) monocline and southern Punjab (Mianwali-Bahawalpur) monocline and Cholistan shelf.
Westward, the Indus Platform sharply steepens to form the Sulaiman and Kirthar foredeeps. fore·deep [fawr-deep, fohr-] Show IPA noun Geology . an elongate sediment-filled sea-floor depression bordering an islandarc or other orogenic belt.
Foredeeps -Sulaiman Foredeep -Kirthar Foredeep
The Khuzdar Knot
This comprises a triangular tract about 75km long and 60km wide south of Kalat Plateau
This tract is comprised of hills and ranges in which strike changes abruptly and repeatedly from N-S to east-west or SW.
It consists of short, narrow, sinuous ridges and wide expanses of flat irregular basin plains occurring in between hills .
Altitude of the hills varies from 1800m to 2400m while that of hills varies between 1000 and 1500m.
The area is drained by the tributaries of the Mula and Kulachi rivers.
These basins are filled with tightly folded Cretaceous shale and thin limestone, uncomformably overlain by less deformed Kirthar Limestone.
The anticlinal axes trend in almost every direction from NE, NS to NW.
They are