



Problems with Continuing education
Mllg notes on. . .
The Geological evolution of New Mexico from 500 mn years ago
Notes mllg feb. 10, 2010 following are notes of UNM lecture and note takers (mllg) interpretation of what he heard.
Mid Cambrian age, 510 mn years ago, no plants, all life forms were aquatic.
Mid Ordivician, 470 mn, mountains eroded from wind and water, rivers extended to coastline carry sediment from mountain erosion.
Early Silerian, 430 mn, more erosion, southern ocean in south half of new Mexico, sediments deposited. Sandia mountain in Albuquerque is formed and was edge of southern ocean
Late Devonian, 370 mn. Green plant life appears, ocean coast line forms from southwest to northeast, and ocean in north from arctic.
Earl Mississippi, 340 mn, Ocean deposits on old rock on Sandia mountain, layer of limestone formed, still present on east slope of Sandia.
Early Pennsylvania, 310 mn, ancestral rockies in Norheast form red bed sandstones, Pangia (earth) forming as central land mass, which will eventually break up into plates to form Africa, Eurasia, south America, Antartica and Australian, and North America, Canada arctic. Equator runs through present day new mexico. Atlantic ocean will form from separation as they spread apart.
Late Devonian, 370 mn, pacific plate collides with continental plate under new Mexico
Early Permian, 280 mn, Pangia (this is us !!!) assembled, no Atlantic ocean, sandstone canyons (monument valley, Chenley forms) the great Permian reef formed (oil men watch with interest as Permian basin consolidates to catch Permian basin oil which will be developed as dinosaurs die several million years in the future).
Early Triassic 240 mn, Oceans in NM recede, mountain ranges to West Texas to Appalachians push sea back. Start of dinosaur , river sediments flow to NM.
Late Triassic 215 mn, dinosaurs evolving on Pangia, New Mexico flat, no mountains.
Jurassic 150 mn, dinosaurs developed, NM arid climate, no mountains, sand stone layers, Navajo sandstone deposits, Zion. When they die their body parts liquefy and flow to Permian basin (note taker’s theory)
Late Jurassic, Pangia starts to break up, pacific plate subducts continental plate, mountains start forming in Montana. Plates of Africa, Eurasia and south America start separating, forming Atlantic ocean, Carribean. Intense compression from pacific plate forces oceans and land eruptions north south across Arizona/NM
Cretaceous 120 mn, New Mexico becomes covered in ocean
Late cretaceous, oceans arrive in NE NM, dinosaurs concentrate on Pangia as single mass, plates are starting to break up, dinosaurs trapped as land bridges disappear.(note takers supposition)
Eocene 50 mn, Sea gone in New Mexico, many earthquakes, compression from Ferolin plate which is between pacific plate and continental plate. Angle of subduction changes from 50 degree to 15 degrees forcing pressure for land to rise, sangre de cristo mountains, formed in New Mexico, Bryce lake (canyon) formed with trapped ocean water, many lakes formed. New mexico start to take shape as we know it. Colorado and Arizona form cool national parks.
Oligocene 30 mn, ferolin plate stops subduction, compression relaxed on land in New Mexico, calderas formed from huge compression relaxation, many volcanic eruptions on New Mexico.
Rio Grane rift formed as split in earth crust break and sediment from Sandia fills in Rio grande rift, sediment formed 2 miles thick over Albuquerque. Rio Grande rift becomes dominant feature in earth as we know it. (New mexico breaks North America into 2 parts at Rio Grande !)
Miocene 20 mn. Basin and Ranges form, volcanic activity slows. Calderas (hot magma reservoirs) under Socorro NM will one day cause magma to flow there, but it will not erupt in explosive force, it will flow.
Note: Geologist (lecturer) recommends that when it happens, and it will happen at any moment and is overdue, that we head there with picnic lunch to watch.
shttp://jan.ucc.nau.edu/~rcb7/Text_WUS.html for reference see this site. If someone questions what I have written, they are right.