caa a22 4500 388017171 CHVBK 20180307124914.0 cr unu---uuuuu 161130e199803 xx s 000 0 eng 10.1017/S0022336000036374 doi S0022336000036374 pii (NATIONALLICENCE)cambridge-10.1017/S0022336000036374 Infrared video microscopy for the study of graptolites and other organic-walled fossils [Elektronische Daten] [Michael J. Melchin, Alan J. Anderson] 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. Copyright © The Paleontological Society Melchin Michael J. Department of Geology, St. Francis Xavier University, P.O Box 5000, Antigonish, Nova Scotia B2G 2W5, Canada <mmelchin@stfx.ca> aut Anderson Alan J. Department of Geology, St. Francis Xavier University, P.O Box 5000, Antigonish, Nova Scotia B2G 2W5, Canada <mmelchin@stfx.ca> aut Journal of Paleontology Cambridge University Press 72/2(1998-03), 397-400 0022-3360 72:2<397 1998 72 JPA https://doi.org/10.1017/S0022336000036374 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0022336000036374 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Melchin Michael J. Department of Geology, St. Francis Xavier University, P.O Box 5000, Antigonish, Nova Scotia B2G 2W5, Canada <mmelchin@stfx.ca> aut NATIONALLICENCE 700 1- Anderson Alan J. Department of Geology, St. Francis Xavier University, P.O Box 5000, Antigonish, Nova Scotia B2G 2W5, Canada <mmelchin@stfx.ca> aut NATIONALLICENCE 773 0- Journal of Paleontology Cambridge University Press 72/2(1998-03), 397-400 0022-3360 72:2<397 1998 72 JPA CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge