For the past 10 years, these U.S. Geological Survey and Kazak scientists have been studying the rocks of the Karatau.
(these U.S. Geological Survey and Kazak scientists; have been studying; the rocks of the Karatau; T:For the past 10 years)
these U.S. Geological Survey and Kazak scientists
have been studying
the rocks of the Karatau T:For the past 10 years