Liu Guangding
Liu Guangding ( ; 29 December 1929 – 7 August 2018 ) was a Chinese geophysicist best known for his work in geophysics , marine geology and petroleum geology . 
<triplet> Liu Guangding <subj> 29 December 1929 <obj> date of birth <subj> 7 August 2018 <obj> date of death <subj> geophysics <obj> field of work