Complex sentence: Trona has also been mined at Lake Magadi in the Kenyan Rift Valley for nearly 100 years, the northern part of Lake Natron is covered by a 1.5 m thick trona bed Manega, P.C., Bieda, S., 1987.
Split into simpler sentences: Trona has also been mined at Lake Magadi in the Kenyan Rift Valley for nearly 100 years. The northern part of Lake Natron is covered by a 1.5 m thick trona bed, Manega, P.C., Bieda, S., 1987.