Maurice Lugeon was a Swiss geologist, and the pioneer of nappe

Nappe

In geology, a nappe is a large sheetlike body of rock that has been moved more than or 5 km from its original position. Nappes form during continental plate collisions, when folds are sheared so much that they fold back over on themselves and break apart. The resulting structure is a...

 tectonics. He was a pupil of Eugène Renevier

Eugène Renevier

Eugène Renevier Swiss geologist, was born at Lausanne, Switzerland, as a descendant of a noble family.In 1857 he became professor of geology and paleontology in the University of Lausanne...

. Named for Maurice Lugeon, the lugeon

Lugeon

A Lugeon is a unit devised to quantify the water permeability of bedrock and the hydraulic conductivity resulting from fractures; it is named after Maurice Lugeon, a Swiss geologist who first formulated the method in 1933...

is a measure of transmissivity in rocks, determined by pressurized injection of water through a bore hole driven through the rock. One lugeon (Lu) is equal to one liter of water per minute injected into 1 meter of borehole at an injection pressure of 10 atmospheres.