Tharparkar is the only fertile desert in the world. The region derives its names from Thar and Parkar. The name Thar is from Thul,
the general term for sand region or sand ridges and Parkar literary
means “to cross over”. The region was earlier known as Thar and Parkar,
later they became one word.
Historical background

Geographical features
There is no stream of fresh water in the region. However, in
Nagarparkar there are two perennial springs, namely Anchlesar and
Sardhro. as well as temporary streams called Bhatuyani River and Gordhro
River which flow during the rainy season. There are some hilly tracks
called Parkar. The Granite Marble has been found there. “Karoonjhar
Mountain” is near to Nagarparkar. There are no lakes, glaciers, plains
in the district. This district is mainly a desert area.
Topography
The Thar Region forms part of the bigger desert of the same name that sprawl over a vast area of Pakistan and India from Cholistan to Nagarparkar in Pakistan and from the south of the Haryana down to Rajasthan in India. The area is mostly deserted and consists of barren tract of the sand
dunes covered with thorny bushes. The ridges are irregular and roughly
paralleled that thy often closed shattered valleys which they raise to a
height to some 46 meters. When there is rain these valleys are moist
enough admit cultivation and when not cultivated they yield luxuriant
crops of rank grass. But the extra ordinary salinity of the subsoil land
consequent shortage of portable water renders many tracks quite
picturesque salt lakes which rarely a day up.
The only hills are in Nagarparkar, on the Northern edge of the Runn
of Kutchh belongs to quite a different geological series. It consist
Granite rocks. Probably an outlying mass of the crystalline rocks of the
Arravelli range. The arravelli series belongs to Archean system which
constitutes the oldest rocks of the earth crust. This is a small area
quite different from the desert. The tack is flat a level expect close
to Nagarparkar itself. The principle range Karoonjhar is 19 km in length
and attains a height of 305 m. smaller hills rise in the east, which is
covered with sars jungle and pasturage and gives rise to two springs
named Anchlesar and Sardhro as well as temporary streams called Bhatyani
and Gordhro after the rain.