Tag: 嘉定龙凤

December 19, 2019 | |Post a Comment

first_imgIn Nature, a team of geologists from four universities has proposed a new model for how the Colorado Plateau rose up over a mile from its surroundings.1  Based on seismic data, they propose a “mantle drip” mechanism by which parts of the lower crust dropped into the mantle, replaced by upwelling magma that condensed and floated, like an inner tube under a table in a swimming pool would cause it to rise.    The Colorado Plateau, covering a 300-mile-wide area in Arizona, Utah, Colorado and New Mexico, is well known for its dramatic landscapes, including the Grand Canyon.  Its origin, however, has been mysterious (06/27/2010, “Colorado Plateau Stumps Geologists”).  The authors wrote in their abstract, “The origin of these high elevations is unclear because unlike the surrounding provinces, which have undergone significant Cretaceous�Palaeogene compressional deformation followed by Neogene extensional deformation, the Colorado plateau is largely internally undeformed.”  It’s as if this 130,000-square-mile province floated up more than a mile without cracking (06/24/2009).  Anyone visiting Grand Canyon has probably been struck by the fact that the strata are flat as pancakes for hundreds of miles.  And geologists believe this plateau rose and sank multiple times.    In brief, the model proposed by the team led by Anthony Levander [Rice University] concerns movements under the crust that can only be deduced indirectly, from echoes of earthquake waves that change velocity as they encounter crust, mantle, and asthenosphere (lower mantle) regions.  Upwelling of mantle material from the asthenosphere would “destabilize continental lithosphere and drive uplift,” they said.  The team went far beyond observations of current data, though, to propose multiple “mantle drip” episodes under the Colorado Plateau over 70 million years.  Then they suggested that the current one, which had the most effect on the origin of the Grand Canyon, began 6 million years ago – reinforcing younger ages for the famous gorge.    Live Science swallowed the model wholesale without criticism, announcing, “Mystery of Grand Canyon’s Formation Revealed.”  In smaller print, it backtracked slightly, saying, “The birth of the Grand Canyon and the Colorado Plateau through which it carved have been a geological mystery.  Now a giant anomalous structure discovered on the underside of the plateau could shed light on how it was formed.”    As for Levander et al, “The timing of both Colorado plateau uplift and formation of the Grand Canyon remain unresolved,” the first line of their paper admitted.  Their proposal that mantle drip and asthenosphere uplift “delaminates” the lower crust episodically, lifting the Colorado Plateau upward, can only be inferred indirectly, and only for the most recent episode (if there was more than one).  “We propose that a series of such events have been removing the lithosphere from the Colorado plateau peripheries since the Farallon slab was removed 20-30 Myr ago, and that we have imaged only the most recent of these,” they ended.  “These events are responsible for the uneven, outside-in magmatic invasion of the plateau, as well as uplift of its edges and interior.”    For more on mysteries of the Colorado Plateau, see 06/27/2010, 06/24/2009.  For more on the age of Grand Canyon, see 09/16/2005, 11/30/2007, 03/05/2008.1.  Levander et al, “Continuing Colorado plateau uplift by delamination-style convective lithospheric downwelling,” Nature 472 (28 April 2011), pp. 461�465, doi:10.1038/nature10001.Where are the philosophers of science?  They are meekly talking amongst themselves in other parts of the campus, afraid to challenge the priesthood in the science department whom our culture has granted epistemic privilege to declare the way the world is.  The timid philosophers are ignored by the science storytellers who run rampant in the journals, announcing their myths as truth to the gullible science media who are only too happy to declare to the peasants what the priesthood has “discovered.”    What are the observations here?  Some seismic records in the present.  Did these geologists see 70 million years, or even six?  Of course not.  They can see current landforms, magma outcrops, fault lines, locations of minerals and oil, mountain elevations and other present-day phenomena, and with seismic data can create maps of underground provinces where the echoes speed up or slow down (which they did).  That’s about it.    The rest is inference.  The word observation occurs only one time in the whole paper: “Petrologic and geochemical observations indicate that late Cretaceous�Palaeogene (~90�40?Myr ago) low-angle subduction hydrated and probably weakened much of the Proterozoic tectospheric mantle beneath the Colorado plateau.”  No, it doesn’t indicate any such thing; what they mean is that the empirical observations appear to “fit” with a model or scenario that they find plausible, within the paradigm of long ages and plate tectonics (07/09/2004).  Time is orthogonal to their data; there is no time evidence except in their heads.    Making inferences is fine if they can be tested, but who other than God could possibly know what actually happened and when?  In contrast to the paltry references to observation, the word “suggests” and its derivatives occur 20 times, as in “The pattern suggests to us….” followed by the word three more times in the next two sentences.  the word empirical is entirely absent; evidence appears four times, but only in references to how it “suggests” parts of the story they wish to tell.    Science was supposed to do more than provide suggestions.  It was supposed to rely supremely on empirical observations.  It has degenerated into a form of divination.  The earthquake echoes say nothing about millions of years; the geologists used the echoes like tea leaves or crystal balls to prophesy.  The prophecies are required to fit the monolithic paradigms of the Science Temple, where observations are mere props for scenarios that “suggest” unobservable events.  These suggestions become plots for stories, handed off to the science reporters who, like court jesters, entertain the public with presumed wisdom from the sages.  Choose your sages wisely, then you may become sagacious yourself.(Visited 143 times, 1 visits today)FacebookTwitterPinterestSave分享0last_img read more

December 3, 2019 | |Post a Comment

first_imgWest Bengal Chief Minister Mamata Banerjee on Friday welcomed the Andhra Pradesh government’s decision to withdraw ‘general consent’ to the CBI for carrying out raids and investigations in the State. “[Chief Minister] Chandrababu Naidu has rightly barred the entry of CBI in his State… Previously there was no such need but times have changed because instructions are being sent to the CBI from the BJP party office. There are such provisions, we have read the Constitution as well,” Ms. Banerjee said at a core committee meeting of her party in Kolkata.last_img read more

November 29, 2019 | |Post a Comment

first_imgBI on alert for illegally deployed OFWs to Iraq Read Next “We want to give an opportunity for more people to see the games,” he said.READ: SBP starts forming best PH team for 2018 Fiba 3×3 World CupFEATURED STORIESSPORTSWATCH: Drones light up sky in final leg of SEA Games torch runSPORTSLillard, Anthony lead Blazers over ThunderSPORTSMalditas save PH from shutoutPreviously, Fiba 3×3 events were held inside malls. SM Megamall in Mandaluyong served as hosts for the 2014 World Tour Manila Masters, while Robinson’s Place Manila in Ermita had the rights in the 2015 edition.“I think we’ve been very successful holding it in the malls. Almost 4,000 people are watching the games. But now, we chose to move it to a bigger venue,” said Panlilio. Brace for potentially devastating typhoon approaching PH – NDRRMC Miranda, Isip bring leadership to Marinerong Pilipino Trending Articles PLAY LIST 00:50Trending Articles00:50Trending Articles00:50Trending Articles01:29Police teams find crossbows, bows in HK university01:35Panelo suggests discounted SEA Games tickets for students02:49Robredo: True leaders perform well despite having ‘uninspiring’ boss02:42PH underwater hockey team aims to make waves in SEA Games01:44Philippines marks anniversary of massacre with calls for justice01:19Fire erupts in Barangay Tatalon in Quezon City Typhoon Kammuri accelerates, gains strength en route to PH “From a Philippine basketball point of view, that gives an opportunity for the youth to watch the game. From the point of view of SBP and Fiba, we want to see bigger crowds in 3×3 and that’s something we want to deliver to Fiba. Hosting events have put the Philippines in the map and shows that we can host events like this, and that’s the reason we also pushed for the hosting of the 3×3 World Cup.”READ: High expectations for 2018 FIBA 3×3 World Cup hostingGilas Pilipinas backer Ronald Mascariñas of Chooks-to-Go also thinks that this event could break attendance records in the 55,000-seater arena.“It’s in the discussion if we’re going to break the record in attendance. But I think the question there is not if we’re going to break, but how many more times we will. Because Fiba should see how passionate the Filipinos are about basketball. That’s a given,” said the Bounty Agro Ventures Inc. president.The current mark for biggest attendance inside the world’s largest indoor stadium is held by the PBA, set last October 27, 2017 in Game 7 of the 2017 PBA Governors’ Cup Finals where 54,083 fans trooped to the venue.ADVERTISEMENT MOST READ Photo by Tristan Tamayo/ INQUIRER.netCompared to past 3×3 events staged in the country, Samahang Basketbol ng Pilipinas (SBP) is going big at home as it is set hold the 2018 Fiba 3×3 World Cup at massive Philippine Arena in June.SBP president Al Panlilio feels that it’s time for the halfcourt game to be staged in bigger venues so that it will be seen by bigger crowds.ADVERTISEMENTcenter_img Asian shares slide on weak Japan data; US markets closed LATEST STORIES Kammuri turning to super typhoon less likely but possible — Pagasa Don’t miss out on the latest news and information. Do not bring these items in SEA Games venues 8th Top Leaders Forum assessed the progress of public-private efforts in building climate and disaster resilient communities View comments John Lloyd Cruz a dashing guest at Vhong Navarro’s weddinglast_img read more