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Douglas E. Ryan
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Journal Article
Stratigraphic occurrences of iridium anomalies at four Cretaceous/Tertiary boundary sites in New Zealand Available to Purchase
Robert R. Brooks, C. Percy Strong, Julian Lee, Charles J. Orth, James S. Gilmore, Douglas E. Ryan, Jiri Holzbecher
Journal: Geology
Publisher: Geological Society of America
Published: 01 September 1986
Geology (1986) 14 (9): 727–729.
Journal Article
Weathered spheroids in a Cretaceous/Tertiary boundary shale at Woodside Creek, New Zealand Available to Purchase
Robert R. Brooks, Paul L. Hoek, Roger D. Reeves, R. Cleland Wallace, James H. Johnston, Douglas E. Ryan, Jiri Holzbecher, John D. Collen
Journal: Geology
Publisher: Geological Society of America
Published: 01 October 1985
Geology (1985) 13 (10): 738–740.
