1.Sathanur Fossil Tree
Geological study shows that more than 120,000,000 years ago, the sea (which lies today about 100 Km. East of Sathanur) had transgressed as far as 8 to 10 Km West of Sathanur. During this period which is Geologically known as the cretaceous, the sea abounded in a variety of marine animals similar to those found in the present day sea. These animals, after death, sank to the bottom and were buried by sands and clays brought down by the rivers. Along with them some of the trees which flourished on the seacoast or near shore were also buried after transport by flooded streams and were petrified in course of time. The large trunk of petrified tree, which can be seen here, lies within the Trichinopoly group of rocks of about 100,000,000 years ago. This tree shows the presence of Conifers (The non flowering plants) that dominated the land vegetation prior to the advent of Angiosperms ( the flowering plants of the present of day.)
The petrified tree trunk at Sathanur measures over 18 meters in length. Similar fossil trees measuring a few meters in length are found along the stream sections near Varagur, Anaipadi, Alundalipur and Saradamangalam. Dr.M.S.Krishnan of the Geological Survey of India first reported this fossil tree in 1940.
2.Ranjankudi Fort
Ranjankudi ( Lat. 11.21’ N. Long.78.57’ E. ) is located 17 K.Ms. North of Perambalur. The Fort was built by a Jagirdar under Nawab of Carnatic in 17th century A.D. The Fort walls are built with neatly cut stone blocks. There are three fortification walls at different heights and the bottom most is the main rampart. It is oblong on plan with semi circular bastions and encircled by a moat fed by a tank on the Southern side. The fort contains a palace, residential buildings, underground chambers, mosque and flag mast. The fort was the scene of the battle of Valikondah between the English and Mohammad Ali on one side and Chanda Sahib and the French on the other side in 1751 AD. This fort is under protection of the Archaeological survey of India.
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