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Calamites, genus of tree -sized, spore -bearing plants that lived during the Carboniferous and Permian periods (about 360 to 250 million years ago). Calamites had a well-defined node-internode architecture similar to modern horsetails, and its branches and leaves emerged in whorls from these nodes. Its upright stems were woody and connected by ...
- Calamitaceae
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- Calamitaceae
Calamites. Calamites is a genus of extinct arborescent (tree-like) horsetails to which the modern horsetails (genus Equisetum) are closely related. [1] Unlike their herbaceous modern cousins, these plants were medium-sized trees, growing to heights of 30–50 meters (100–160 feet). [2]
History of Calamities. T ran s L at or's note: Peter Abelard ( 1079-1142) won a vast and tumultuous celebrity as a. teacher, philosopher, poet, composer, heretic, monk, and husband (of the philosopher Héloïse) during the career he recounted in what has come to be known as his History of Calamities. Couched as a letter of consolation to an ...
May 13, 2004 · Abstract. In Catastrophes and Lesser Calamities, renowned geologist Tony Hallam takes us on a tour of the Earth’s history, and of the cataclysmic events, as well as the more gradual extinctions, that have punctuated life on Earth throughout the past 500 million years. While comparable books in this field of study tend to promote only one ...
- Tony Hallam
Calamite fossils. Calamites are a type of horse tail plant that lived in the coal swamps of the Carboniferous Period. They were prehistoric relatives of the modern horse tail, but looked more like a pine tree and grew up to 40 feet. They had upward-slanted slender branches, arranged around a bamboo-like trunk in rows spaced several feet apart ...
Calamites extends from the Late Mississippian into the Permian and is reconstructed as an upright, arborescent plant that grew to a height of ∼20 m; stems could reach a diameter of >60 cm, for example, Arthropitys ezonata (FIG. 10.32) (Rössler and Noll, 2006). Calamiteans were slightly smaller plants than many of the arborescent lycopsids or ...
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May 13, 2004 · In Catastrophes and Lesser Calamities, renowned geologist Tony Hallam takes us on a tour of the Earth's history, and of the cataclysmic events, as well as the more gradual extinctions, that have ...
