  A theory of fossil turbulence presented in the 11th Liege Colloquium on
Marine turbulence is "revisited" in the 29th Liege Colloquium "Marine
Turbulence Revisited". The Gibson (1980) theory applied universal similarity
theories of turbulence and turbulent mixing to the vertical evolution of an
isolated patch of turbulence in a stratified fluid as it is constrained and
fossilized by buoyancy forces. Towed oceanic microstructure measurements of
Schedvin (1979) confirmed the predicted universal constants. Universal
constants, spectra, hydrodynamic phase diagrams (HPDs) and other predictions of
the theory have been reconfirmed by a wide variety of field and laboratory
observations. Fossil turbulence theory has many applications; for example, in
marine biology, laboratory and field measurements suggest phytoplankton species
with different swimming abilities adjust their growth strategies differently by
pattern recognition of several days of turbulence-fossil-turbulence dissipation
and persistence times above threshold values, signaling a developing surface
layer sea change. In cosmology, self-gravitational structure masses are
interpreted as fossils of primordial hydrodynamic states.
