Interesting paper about traces the history of oceanic drilling by GSAToday
Source http://www.geosociety.org/gsatoday/science/G380A/article.htm?_zs=XIwNb1&_zl=UO1d5&fbclid=IwAR0Y3vz9iFii1ptgaDHZkptnPpLrDP-NG7vCxy155QqdEBc4blGQOwEXEgU#.XIlb6M4quuQ.twitter
