Late Hesperian

Some articles on hesperian:

Hesperian Chronology and Stratigraphy - Boundaries and Subdivisions
... The lower boundary of the Hesperian System is defined as the base of the ridged plains, which are typified by Hesperia Planum and cover about a third of the planet’s surface ... The Hesperian’s upper boundary is more complex and has been redefined several times based on increasingly detailed geologic mapping ... Currently, the stratigraphic boundary of the Hesperian with the younger Amazonian System is defined as the base of the Vastitas Borealis Formation (pictured right) ...

Famous quotes containing the word late:

    The press and politicians. A delicate relationship. Too close, and danger ensues. Too far apart and democracy itself cannot function without the essential exchange of information. Creative leaks, a discreet lunch, interchange in the Lobby, the art of the unattributable telephone call, late at night.
    Howard Brenton (b. 1942)