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American Museum of Natural History, New York, NY: Natural History, Inner Beauty. Petrified wood from the Triassic Chinle Formation, Arizona. Remarkable photographs reveal the structure of fossil organisms whose tissues, over eons, have been replaced by minerals. Photographs by Giraud Foster and Norman Barker.

Petrified Forest National Park, Arizona, and http://www.desertusa.com/pet/index.html.

Henry Barwood, Mineral Resources Section, Indiana Geological Survey, Bloomington, Indiana: The mineralogy and origin of coal balls.

The University of California Museum of Paleontology, Berkeley: Localities of the Devonian: Rhynie Chert, Scotland. Section through a fossilized stem of Aglaophyton major.

britannica.com: Rhynie plants.

The Petrified Forest, Calistoga, California: Petrified Forest Links.

Richard Dayvault, Heldref Publications, Gale Group (hosted by FINDarticles.COM): "RED WOOD". From the Yellow Cat Area of Grand County, Utah. References on page 10. From Rocks & Minerals, 11 pages, July 01 2000.

Paleontology Division, Geological Association of Canada: GSC's JURASSIC (and CRETACEOUS) PARK, Fossil log 16 metres long, badlands of southern Alberta, photograph by C.M. Sternberg (GSC/CGC 40002).

Andrew B. Heckert, Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, and Spencer G. Lucas, New Mexico Museum of Natural History and Science, Albuquerque: Stratigraphic Distribution and Age of Petrified Wood in Petrified Forest National Park, Arizona.

Andrew B. Heckert, Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, and Spencer G. Lucas, New Mexico Museum of Natural History and Science, Albuquerque: The Oldest Triassic Strata Exposed in the Petrified Forest National Park, Arizona.

Paul V. Heinrich, Louisiana Fossil Page: Common Animal and Plant Fossils of Louisiana, Louisiana Petrified Wood, and Petrified Palm Wood.

Pat Holleran, Park Vision, Images of America's National Parks & Monuments: Petrified Forest National Park. See also http://www.shannontech.com/ParkVision/PetForest/PetWood.html

The International Golden Fossil Tree Society (?): BOSQUE PETRIFICADO DE SARMIENTO(Argentina)Patagonia (in Spain).

Kentucky Geological Survey, University of Kentucky, Lexington: Plants. Images of Callixylon, the silicified log of Archaeopteris (Devonian).

Hans Kerp (photographs and graphics are by Hagen Hass and Hans Kerp), Palaeobotanical Research Group, Westfälische Wilhelms University, Münster: The Rhynie Chert and its Flora. A depiction of the silica permineralized fossil flora of Rhynie (Scotland), a 400 Million year old flora, which contains a wide diversity of taxa varying from unicellular fungi to the earliest anatomically preserved higher land plants and animal remains. Breathtaking thin section micro-photographs, e.g. in " V. The alternation of generations in early land plants": The male gametophyte with antheridia, the release of sperm from antheridium, etc.

Parques Nacionales de La República Argentina: MONUMENTO NATURAL BOSQUES PETRIFICADOS (in Spain).

Petrified Forest of Lesvos.

McManus, Hilary A., Edith L. Taylor, Thomas N. Taylor, and James W. Collinson: PETRIFIED GLOSSOPTERIS FROM COLLINSON RIDGE, SHACKLETON GLACIER AREA, ANTARCTICA. Abstract, XVI International Botanical Congress.

Steven R. Manchester, Department of Natural Sciences, Florida Museum of Natural History, University of Florida, Gainsville: PETRIFIED WOODS IN FLORIDA. This article was a contribution to Papers In Florida Paleontology, No. 8, November 1996, published by the Florida Paleontological Society.

Palaeobotanical Research Group, Münster, Westfälische Wilhelms University, Münster, Germany. History of Palaeozoic Forests, MODES OF PRESERVATION. Link list page with picture rankings. The links give the most direct connections to pictures available on the web.

J. Michael Parrish, Department of Biological Sciences, Northern Illinois University, DeKalb, Illinois (Encyclopedia of Dinosaurs): Petrified Forest.

Mike Pole, Dept. of Botany, University of Queensland, Brisbane, Australia: JURASSIC Life on the Edge of Gondwana.

Authored by the The Rhynie Chert Research Group, University of Aberdeen, with contributions and support by the Palaeobotanical Research Group, University of Münster, Germany, the Centre for Palynology, University of Sheffield, The Natural History Museum, London, and The Royal Museum, National Museums of Scotland: The Biota of Early Terrestrial Ecosystems, The Rhynie Chert. A resource site for students and teachers covering many aspects of the present knowledge of this unique geological deposit (including a glossary and bibliography pages). Go to: Silicification and the Conversion of Sinter to Chert.

Gar W. Rothwell, Department of Environmental and Plant Biology Ohio University, Athens: Cutting a Coal Ball and Coal Ball Peel Technique. Part of the Paleobotany course.

Peter von Sengbusch, Institute of Botany, University of Hamburg: Petrified wood from Bayuda (Sudan) and from Namibia. Part of "Botanik online" Go to Leitgewebe (in German).

Margot Guerra Sommer and Claiton M. S. Scherer, Universidade Federal do Rio Grande do Sul (Brazilian Commission of Geological and Paleobiological Sites): Sítios Paleobotânicos do Arenito Mata nos Municípios de Mata e São Pedro do Sul, RS (in Portuguese). A Brazilian deposit of fossil silicified wood.

Ed Strauss: Petrified Wood From Western Washington. Go to: Table of Genera. Microscopic images of Acer momijiyamense, Alnus latissima, Carpinus absarokensis, Cercidiphyllum, Cornoxylon, Diospyroxylon, Fagoxylon, Quercinium lamarense, Licquidambaroxylon weylandi, Carya tertiara, Pterocarya rhoifilia, Laurinoxylon, Robinioxylon, Magnolia, Lirodendroxylon.

Robert Titus, Hartwick College, Oneonta NY (A Virtual Field Trip, Catskill Mountains); The Gilboa (fossil) forest.

Treasures of the Earth, Ltd., Hollsopple, PA., U.S.A.: Petrified Wood. Images of petrified wood slabs, chiefly from the Chinle Formation, Utah, USA.

Nigel H. Trewin, Clive M. Rice and Lyall I. Anderson, Geology & Petroleum Geology, University of Aberdeen: Rhynie Chert Research. Ancient environments, ecosystems and mineralisation of Devonian hot springs.

UntraveledRoad, Paris, ID: Petrified Forest National Park Information Center. The Photographic Virtual Tour Website. Go to: Triassic Landscape.

E. Velitzelos, Section of Palaeontology and Stratigraphy, Department of Geology, University of Athens, and N. Zouros, Natural History Museum of Lesvos' Petrified Forest, Lesvos Island: The Petrified forest of Lesvos - Protected Natural Monument.

WAYNE'S WORD, Escondido, CA (A nonprofit quarterly journal published by WOLFFIA INC.): Fossils Of Ancient Plants. This websites are dedicated to little-known facts and trivia about natural history subjects.

Ian West, School of Ocean and Earth Science, Southampton University, Southampton: The Fossil Forest near Lulworth Cove, Dorset. The Fossil Forest, west of Lulworth Cove, Dorset, southern England, is a classic geological locality with the remains and moulds of late Jurassic or early Cretaceous coniferous trees rooted in a palaeosol. Let´s have a look at the Purbeck Trees.