The Spores and Pollen of the Potomac Group of MarylandState of Maryland, Board of Natural Resources, Department of Geology, Mines, and Water Resources, 1963 - Geology - 215 pages |
Contents
Distribution and percentage occurrence of the spores and pollen from the Potomac | 1 |
STRATIGRAPHY OF THE POTOMAC GROUP | 5 |
Appendicisporites Cicatricosisporites | 7 |
10 other sections not shown
Common terms and phrases
abundant Albian angiosperms Appendicisporites Aptian Araucariacites australis Arundel Clay bacula Balme Bolkhovitina Cenomanian central body Cicatricosis Cicatricosisporites circular Comments Cookson and Dettmann coordinates Couper Delcourt and Sprumont Description dicotyledonous Dimensions distal side distal surface ektexine endexine Ephedripites exine figures X 1000 focus on distal focus on proximal Genus Geol Groot and Penny gymnosperm high focus Holotype Jurassic laesurae Lithologic low focus Lower Cretaceous Lycopodiacidites margin Maryland Maximum diameter medium focus showing microflora micromunus Micropaleontology Monosulcites muri Neocomian Occurrence ornamentation outline in polar Paleontographica Patapsco Formation Patuxent Formation Plate polar view triangular porites Potomac Group Potonié Probe Hole proximal surface Rare to occasional restricted to Zone reticulum Retitricolpites sample frequency high sample frequency low sample frequency moderate Sand scabrate Schizaeaceae silt Slide St species sporangium spores and pollen sporomorphae stratigraphic sulcus surface samples thickening Tricolpopollenites Trilete spore Trilobosporites tumulus verrucae Wealden width