Hello Webo: I acknowledged You in my NPA paper. Your objections are priceless. Please don't stop objecting.webolife wrote:No basalt vents? ... careful there... Craters of the Moon displays lots of basalt vents but neither the Columbia River plateau nor the Yellowstone caldera display these, yet clearly the basalt flowed from vents... The basalt near Grand Junction is similar in formation to the typical columnar-vessicular flows we see in the Northwest and other parts of the world, eg Antarctica, or the Deccan province in India. The flow and cooling characteristics are classical. Attributing their formation to enhanced aurorae or interplanetary megalightning is exotic to an extreme. Oops, I forgot to check if my objections were still welcome around here
It's true, geologists know where the lava for Grand Mesa came from. It came from a far away mystery location. The whole area of the lava flow was the height of todays Grand Mesa. Then all of the valleys eroded away.
http://ghostdepot.com/rg/library/survey ... survey.htm
[...]
A short distance from the station at Delta the railroad crosses Uncompahgre River and then runs along the bank of Gunnison River which the traveler has not seen since he left Black Canyon. Here the Grand Mesa is in full view to the north (right). All the lower slopes of this mesa are composed of the Mancos shale, which is so soft that it generally forms valleys wherever it is exposed, but the shale in the mesa is protected by overlying sandstone that is capped by a thick sheet of solidified lava (basalt). When this lava was poured out the present lowlands had not been cut, and the whole surface stood at the same level as that of the top of Grand Mesa. The volcano or volcanic vent from which this great flow was ejected has not been definitely located, but it may have been at a considerable distance, for this sheet is probably a part of the great lava flow that covered much of this general region, a flow whose remnants can still be seen on Grand Mesa and Battlement Mesa, to the north, on the Flattops, north of Glenwood Springs, and on other high mesas. If these remnants are not a part of a single flow they are probably parts of independent flows that occurred at about the same time. As the West Elk Mountains, east of Somerset, were a center of great volcanic activity at about this time the lava may have originated there. The striking thing about these lava flows is the enormous amount of erosion that has taken place since they occurred. The date of the flow can be fixed only as some time in the Tertiary period, but it was long enough ago to permit the removal from the valleys of rocks at least a mile in thickness.
me again,
So according to this, a mile of rocks needs to have eroded away to form the valleys between the continuous basalt flow from 30 miles away.
The process occurred 30,000,000 years ago according to the report below.
http://grandjunctiongeology.wikispaces.com/Grand+Mesa
[...]
The Grand Mesa
The Grand Mesa is the largest mesa in the world. It has an area of around 2,167
square miles and its highest point is Crater Peak which is around 11,327
feet above sea level. The Mesa also has around 300 lakes. It is generally
thought to have once been a volcano but that is a common misconception.
The mesa is the result of a volcanic vent that oozed lava and formed a hard
basalt layer on its top. The volcanic layer is 30 million years old and was created
back when the Modern Rockies where formed. The lowest layers are yellow and
gray Mancos Shale from the early Cretaceous. The Mesa Verde Group that forms
a cliff about halfway up the side of the mesa, and the top layer rests on the
Tertiary shale and sandstone known as the Green River and Wasatch Formations.
me again,
Or maybe it was plasma that melted the the basalt in situ.
michael
