fossil occurrence host:www.geo.arizona.edu

Listing 1 - 9 from 9 for fossil occurrence

pollen grain morphology juniper
... visible in fresh pollen. Sculpturing gemmate and the gemmae (spherical elements) deciduous. Fossil pollen ordinarily split, forming the characteristic "pac man" shape. Pollen scanning electron ... with that of the "Taxodiaceae" (papillate grains) and Taxaceae -- the "TCT" pollen type. Fossil Occurrence: Plant fossils (leaves, cones) are known from the early Mesozoic onward. References: Erdtman ...
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pollen grain morphology ephedra
... lower Grand Canyon. Preservation: Good preservation. Fossil Occurrence: Ephedra is an member of the ancient gymnosperm Class Gentophyta, whose foliage is present in the fossil record from the Triassic onward, associated ... Links Geocities site with lots of plant photos Intro. Gymnosperms by Beth Budny Eocene Fossil Lake, MT Univ. Alberta Bot. 511 Notes Sahara Ephedra % Dupont Leroy KEY TO POLYPLICATE ...
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pollen grain morphology abies
... High percentages are only found where the plants are nearby. Preservation: Well Preserved. Fossil Occurrence: References: Bagnall, C. R., Jr. 1974. Pollen morphology of Abies, Picea, and Pinus ... . 1975. Scanning electron microscopic identificaiton of fossil pinaceae pollen to species by surface morphology. Palynology 1: 157-165. Links Berkeley Fossil Record Pinaceae plant photo Albion College, Mich. ...
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pollen grain morphology spruce
... close correlation of spruce pollen values and vegetation abundance. Preservation: Well preserved. Fossil Occurrence: References: Bagnall, C. R., Jr. 1974. Pollen morphology of Abies, Picea, and ... 1975. Scanning electron microscopic identificaiton of fossil Pinaceae pollen to species by surface morphology. Palynology 1: 157-165. Links Berkeley Fossil Record Pinaceae plant photo Albion College, Mich ...
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pollen grain morphology pine
... the bladders is usually ruptured, preventing the identification of Hap. vs. Dip. subgenera. Fossil Occurrence: Bisaccate conifer pollen occurrs from the late Paleozoic onward. However, plant fossils (leaves, cones ... full-glacial vegetation isn southeastern North Carolina. Ecology 45: 767-777. Links Berkeley Fossil Record Pinaceae plant photo Albion College, Mich. Image Gallary plant photo Trees of ...
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pollen grain morphology larch
... s deterioration. Fossil Occurrence: Douglas-fir plant fossils have been found in both Asia and western North America from Oligocene onward. Neither Pseudotsuga nor Larix pollen is common in the fossil record. ... plant photo University Wisconsin Conifer Descriptions plant BoDD Pinaceae (UK) Gymnosperm Database C.Earle fossil Pseudotsuga Schorn and Thompson U.C. Berkeley Owen K. Davis 12/99
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pollen grain morphology hemlock
... micrograph (SEM) Production and Dispersal: Wind pollinated with moderate production moderate dispersal Preservation: Well preserved. Fossil Occurrence: An abrupt decline in the abouncance of eastern hemlock (T. canadensis) occurred 4700 years ago ...
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pollen grain morphology metasequoia
... Wind pollinated with moderate production and dispersal (?). Preservation: Moderate to poor preservation (?). Fossil Occurrence: Metasequoia glyptostoroboides is a "living fossil" whose foliage is common in late-Cretaceous through Pleistocene sediments of the ... winter folage (bare) Oregon State U folaige male strobili and female cone Oregon State U fossil leaf Harvard Herbarium Owen K. Davis 12/99
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pollen grain morphology artemisia
... walls is good, and the characteristic shape is easy to recognize in poorly-preserved samples. Fossil Occurrence: The earliest plant fossils of Artemisia probably are of mid- Cenozoic age. Artemisia pollen is ...
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