BIO 3102 : carbiniferous and permian.doc
Document Summary
During paleozoic era (in phanerozoic eon) glaciation, low sea level, mountain building a lot of coal beds laid down aquatic: no major body forms lost unusual trees in forests, gymnosperms dominate. * the continents are forging together from pole to pole with ice at each pole. * we have massive carboniferous forests (dominated by fern and mosses) * most organisms in oceans are still there in terms of the phyla. * characteristics there> morphologically they don"t look the same as they do now. * no major seed plants, doing this all with spores to create massive forests. * no organisms capable of breaking down the lignin the plants would die and nothing would recycle them, fossilized due to high amount of co2 and over time they stacked up on top of each other to produce coal. * 30% oxygen in atmosphere during this time. * over time, the gametophytes get smaller and the plant will spend more time sporophyte structure.
