Petroleum was formed on the ground        →      under

many millions of years ago. Plants and

animals live in the sea sank to the seabed  →      living

when they died. Their remains mixed with

sand and mud in layered deposits, built up

slowly over the years. A combined action of    →     The

heat, pressure and bacteria turned these

deposits into petroleum. The petroleum

moved slowly upwards to the porous rocks or

became trapped there. With the passage of

time, land what was once under water rose to  →    that

the face of the sea. As such, petroleum             →    surface

deposits are now found on or near dry land.

$#Kunchan$

Petroleum was formed on the ground many millions of years ago. Plants and animals live-> living in the sea sank to the seabed when they died. Their remains mixed with sand and mud in layered deposits, built up slowly over the years. A-> The combined action of heat, pressure and bacteria turned these deposits into petroleum. The petroleum moved slowly upwards to the porous rocks or became trapped there. With the passage of time, land what-> that was once under water rose to the face-> surface of the sea. As such, petroleum deposits are now found on-> in or near dry land.