English to Dutch Science Geology tectonic... and other

Ik weet niet precies hoe 'elevation' vertaald moet worden, het is niet hetzelfde als 'uplift'(opheffing). Suggesties?
de zin: Apatite ages increase systematically with elevation, and a pronounced break in the age versus elevation profile has been recognised at about 800 m on Mt Doorly. The apatit age of about 50 Ma at this point approximates the time at wich uplift of the mountain range began.