Browsing by Author "Tonkin, Philip J."

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Annotated bibliography of central North Island volcanic ash stratigraphy

Tonkin, Philip J.; Pullar, W.A. (Waikato Geological Society, The University of Waikato, 1967)

Prior to 1929 many observations had been published giving brief accounts of the volcanic ash deposits in various parts of the North Island but no detailed investigations were undertaken. With the incidence of Bush Sickness ...
Colin George Vucetich (1918–2007)—pioneering New Zealand tephrochronologist

Lowe, David J.; Tonkin, Philip J.; Neall, Vincent E.; Palmer, Alan S.; Alloway, Brent V.; Froggatt, Paul C. (Elsevier, 2008)

Many Quaternarists, tephrochronologists, and soil scientists mourned the passing in New Zealand of Colin Vucetich—gentle mentor, pedologist, and pioneering tephrochronologist—on 25 April (Anzac Day), 2007. Colin was in his ...
Contorted stratification with clay lobes in volcanic ash beds, Raglan-Hamilton region, New Zealand

Tonkin, Philip J. (Waikato Geological Society, The University of Waikato, 1970)

Contorted stratification in basal volcanic ash beds of the Pleistocene Hamilton Ash Formation incorporates halloysitic clay lobes which project upward into a bed of predominantly allophanic material. The forms produced are ...
Dusty horizons

Lowe, David J.; Tonkin, Philip J.; Palmer, Alan S.; Palmer, Jonathan G. (Geological Society of New Zealand in association with GNS Science, 2008)

Dust whipped up and deposited by wind forms sheets of loess, which drape over the land. These loess deposits and the soils formed within them yield insights into past climatic and environmental change.
Dusty horizons

Lowe, David J.; Tonkin, Philip J.; Palmer, Jonathan G.; Lanigan, Kerri Miriam; Palmer, Alan S. (Geoscience Society of New Zealand with GNS Science, 2015)

Dust whipped up and deposited by wind forms sheets of loess, which drape over the land. These loess deposits and the soils formed within them yield insights into past climatic and environmental change.