Age of the Mount Laurel and Navesink Formations at Marlboro, New Jersey, from K-Ar Measurement of Glauconite
K-Ar ages of 61 and 63 m.y. for the Navesink and Mount Laurel Formations, respectively, at Marlboro, New Jersey, fit in reasonably well with previous data which indicate that the base of the Paleocene is between 62 and 67 m.y. old.