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Infrared video microscopy for the study of graptolites and other organic-walled fossils

Published online by Cambridge University Press:  20 May 2016

Michael J. Melchin  and
Alan J. Anderson
Michael J. Melchin
Affiliation:
Department of Geology, St. Francis Xavier University, P.O Box 5000, Antigonish, Nova Scotia B2G 2W5, Canada
Alan J. Anderson
Affiliation:
Department of Geology, St. Francis Xavier University, P.O Box 5000, Antigonish, Nova Scotia B2G 2W5, Canada
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Abstract

Organic-walled fossils, such as graptolites and Chitinozoa, show a high degree of transparency to near infrared radiation relative to visible light. Infrared video microscopy (IVM) provides real-time images of the three-dimensional form and internal structure of many specimens that are opaque to visible light. An infrared video camera can be mounted on a biological or petrographic, transmitted-light microscope, and with the addition of a monitor and video printer, images can be viewed and directly printed. With the use of a digital frame-capture system, the IVM images can be digitally stored for analysis, enhancement and printing. As compared with scanning electron microscopy, which only reveals the external form, IVM shows such features as fusellar growth bands and internal septa of graptolites and the prosome structure of Chitinozoa. This method eliminates the need for chemical clearing of specimens for study in visible light, which damages the surface texture and commonly renders specimens too brittle for further manipulation. Infrared video microscopy is potentially applicable to the study of any organic-walled fossils and to the petrographic study of sedimentary organic matter.

Type
Research Article
Information
Journal of Paleontology , Volume 72 , Issue 2 , March 1998 , pp. 397 - 400
Copyright
Copyright © The Paleontological Society 

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References

Bockelie, T. G. 1981. Internal morphology of two species of Lagenochitina (Chitinozoa). Review of Paleobotany and Palynology, 34:149–164.Google Scholar
Briggs, D. E. G., Kear, A. J., Baas, M., de Leeuw, J. W., and Rigby, S. 1995. Decay and composition of the hemichordate Rhabdopleura: implications for the taphonomy of graptolites. Lethaia, 28:15–23.CrossRefGoogle Scholar
Campbell, A. R. 1991. Geologic applications of infrared microscopy, p. 161–171. In Barker, C. E. and Kopp, O. C. (eds.), Luminescence microscopy and spectroscopy. Society of Economic Paleontologists and Mineralogists Short Course 25.Google Scholar
Campbell, A. R., Hackbarth, C. J., Plumlee, G. S., and Petersen, U. 1984. Internal features of ore minerals seen with the infrared microscope. Economic Geology, 79:1387–1392.Google Scholar
Fortey, R. A., and Cooper, R. A. 1986. A phylogenetic classification of the graptoloids. Palaeontology, 29:631–654.Google Scholar
Jansonius, J. 1964. Morphology and classification of some Chitinozoa. Bulletin of Canadian Petroleum Geology, 12:901–918.Google Scholar
Kraft, P. 1932. Die Mikrophotographie mit infraroten Strahlen. International Congress of Photography, 8, Dresden, 1931, Berichte, p. 341–345.Google Scholar
Laufeld, S. 1974. Silurian Chitinozoa from Gotland. Fossils and Strata, 5, 130 p.Google Scholar
Lukasik, J. J., and Melchin, M. J. 1994. Morphology and astogeny of Atavograptus primitivus (Li) from the earliest Silurian of Cornwallis Island, Arctic Canada. Journal of Paleontology, 68:1159–1163.CrossRefGoogle Scholar
Lukasik, J. J., and Melchin, M. J. 1997. Morphology and classification of some early Silurian monograptids (Graptoloidea) from the Cape Phillips Formation, Canadian Arctic Islands. Canadian Journal of Earth Sciences, 34:1128–1149.Google Scholar
McMillan, P. F., and Hofmeister, A. M. 1988. Infrared and Raman spectroscopy, p. 99–160. In Hawthorne, F. C. (ed.), Spectroscopic methods in mineralogy. Reviews in Mineralogy 18.Google Scholar
Melchin, M. J. In press. Morphology and phylogenetic classification of some Early Silurian Diplograptid genera from Cornwallis Island, Arctic Canada. Palaeontology.Google Scholar
Mitchell, C. E. 1987. Evolution and phylogenetic classification of the Diplograptacea. Palaeontology, 30:353–405.Google Scholar
Richards, J. P., and Kerrich, R. 1993. Observations of zoning and fluid inclusions in pyrite using a transmitted infrared light microscope (λ ≤ 1.9μm). Economic Geology, 88:716–723.Google Scholar
Rigby, S. 1994. Hemichordate skeletal growth: shared patterns in Rhabdopleura and graptoloids. Lethaia, 27:317–324.Google Scholar
Rolfe, W. D. I. 1965. Uses of infrared rays, p. 344–350. In Kummel, B. and Raup, D. (eds.), Handbook of Paleontological Techniques. W. H. Freeman and Co., San Fransisco.Google Scholar
Williams, S. H., and Stevens, R. K. 1988. Early Ordovician (Arenig) graptolites from the Cow Head Group, western Newfoundland. Palaeontographica Canadiana, 5.Google Scholar