Laurence L. Sloss (August 26, 1913 – November 2, 1996) was an American geologist.

[1][2] He was president, Geological Society of America (GSA), with his tenure beginning in 1980.

[3] The GSA's Laurence L. Sloss Award is named in his honor.

[4] He was also president of the Society for Sedimentary Geology and American Geosciences Institute.

As a whole, these sequences are large-scale cycles in sedimentary rock records that indicate broad patterns of environmental change over geologic time – specifically marine transgression and regression.