Metasequoia fossils11/18/2023 ![]() ![]() But five years after Miki’s paper was published, the existence of a live metasequoia was confirmed in the Chinese hinterland. ![]() In academic circles back then, metasequoia was believed to be extinct. ![]() “He was once stopped by police, who suspected he was dealing in black-market rice,” said Atsushi Yabe, 50, the museum’s chief researcher. On display was Miki’s favorite backpack, which he used to haul fossils embedded in mud that he collected from various places including Gifu and Wakayama prefectures. I went to the museum to see a special exhibition titled “Metasequoia: A Living Fossil.” That was in 1941, the year Japan entered the Pacific War. The prefix “meta” means “after” or “beyond” in Greek. He published his discovery, naming it metasequoia. While analyzing numerous plant fossils, Miki came across an unidentified deciduous tree among those thought to be evergreen sequoia. The metasequoia, also known as “a living fossil,” was named 80 years ago by botanist Shigeru Miki (1901-1974), who taught at Kyoto Imperial University, present-day Kyoto University. Pinus), and is missing taxa detected in the microflora, a pattern likely due to sampling effectiveness at the Red Lake Mine and sampling of different lithofacies for macro-and microfloras.Two towering trees stretch their branches into the wintry sky in a corner of the National Museum of Nature and Science in Tokyo’s Ueno district. ![]() Miocene floras (e.g., foliage of Pinaceae esp. Pacific Northwest (i.e., richness in oaks) but is of much lower diversity and lacks key elements common to many of the contemporaneous U.S. The Red Lake flora shows similarities to middle to late Miocene floras from the U.S. The Red Lake middle Miocene climate reconstructed from leaf physi-ognomy was temperate and mesic, with mean annual temperature ~11-13☌, mild winters (coldest month mean temperature ~3☌), mean annual precipitation 170 −51/+73 cm/yr, and growing season precipitation ~92 cm, with moderate seasonality of precipitation (three wettest months ~51 cm vs. pseudolyrata, Quercus sp.), leaves of an alder (Alnus harneyana) and birch (Betula thor), chestnut (Castanea spokanensis), beech (Fagus pacifica), sycamore (Platanus dissecta), elm (Ulmus speciosa), leaves of unidentified taxa, fruits of Tilia pedunculata (Malvaceae) and fruits and inflorescences of other unidentified taxa, and leaves of a reed or rush (indet. The Red Lake macroflora contains rare Ginkgo leaves, shoots of Cupressaceae (Cupressinocladus, Metasequoia, Taxodium) and shoots and seeds of Pinaceae (Pseudotsuga, Tsuga), maple (Acer) seeds and leaves, Liquidambar (fruit), Trochodendraceae (Zizyphoides auricu-lata leaves, Nordenskioeldia interglacialis fruits), leaves of 4 species of red and white oaks (Quercus columbiana, Q. In this report, the Red Lake macroflora from sediments of the middle Miocene Deadman River Formation exposed in the Red Lake diatomite mine north of Kamloops, British Columbia, is illustrated, and a preliminary assessment presented, along with a brief review of Miocene floras from British Columbia and the U.S. Dawson and his contemporaries in the late 19 th century. Despite early interest in Neogene floras, primarily Miocene sites associated with Mio-Pliocene volcanic deposits of the Interior Plateau of British Columbia, few systematic accounts of the Miocene macrofloras of British Columbia-or elsewhere in non-Arctic Canada-have been published since the pioneering studies of J.W. ![]()
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |