Age determination of the rhyolites of the Lord Howe Rise in the Southwest Pacific Ocean

Drilling at site 207 (DSDP Leg 21), located on the broad summit of the Lord Howe Rise, bottomed in rhyolitic rocks. Sanidine concentrates from four samples of the rhyolite were dated by the 40Ar/39Ar total fusion method and conventional K-Ar method, and yielded concordant ages of 93.7 +/- 1.1 my, equivalent to the early part of the Upper Cretaceous. At this time the Lord Howe Rise, which has continental-type structure, is thought to have been emergent and adjacent to the eastern margin of the Australian-antarctic continent. Subsequent to 94 my ago and prior to deposition of Maastrichtian (70-65 myBP) marine sediments on top of the rhyolitic basement of the Lord Howe Rise, rifting occurred and the formation of the Tasman Basin began by sea-floor spreading with rotation of the Rise away from the margin of Australia. Subsidence of the Rise continued until Early Eocene (about 50 myBP), probably marking the end of sea-floor spreading in the Tasman Basin. These large scale movements relate to the breakup of this part of Gondwanaland in the Upper Cretaceous.

Ethnological and biogeographical significance of pottery sherds from Nissan Island, Papua New Guinea / Susan Kaplan, Bryn Mawr College.

v.66:no.3(1976)

Prehistoric men / by Robert J. Braidwood, Research Associate, Old World Prehistory; Associate Professor, Oriental Institute and Dept. of Anthropology, University of Chicago. Drawings by Susan T. Richert.

no.37(1948)

Wm Howe & others Account and Receipt, 1768 May 21

Itemized handwritten bill for the services of eight men who guarded the College property on April 3, 1768. Includes a note by Deputy Sheriff William How[e] acknowledging receipt of payment by President Holyoke on May 21, 1768.

Letter from Samuel Willard, Deerfield, Massachusetts, to Susan Holland [nee Willard], Belchertown, Massachusetts, August 20, 1815

Willard says that everyone is in good health and asks his sister to write to him.

Papers of Helen Lawrence Appleton Brooks, 1822-1985

Mostly correspondence between family members, beginning with Catherine Lawrence and Charles Appleton, the parents of Helen Brooks. Also records of Brooks' voluntary activities, her diaries and personal writings, and material collected by Grace Norton about Henry James.