The section of the Danube studied is situated in the so-called "Inland Delta" area of the Danube, which is formed by up to 300 m thick layers of river gravel, sand and other alluvial sediments deposited over thousands of years.
(the Danube; is formed; by up to 300 m thick layers of river gravel, sand and other alluvial sediments) (up to 300 m thick layers of river gravel, sand and other alluvial sediments; deposited; over thousands of years) (The section of the Danube; studied; is situated in the so-called "Inland Delta" area of the Danube)
the Danube up to 300 m thick layers of river gravel, sand and other alluvial sediments The section of the Danube
is formed deposited studied
by up to 300 m thick layers of river gravel, sand and other alluvial sediments
over thousands of years
is situated in the so-called "Inland Delta" area of the Danube