Origin, sequence stratigraphy and depositional environment of an upper Ordovician (Hirnantian) deglacial black shale, Jordan

first_imgThe upper Ordovician succession of Jordan was located ~60°S, less than 100 km from the Hirnantian ice sheet margin. New graptolite dates indicate glaciation ended in Jordan in the late Hirnantian (persculptus Biozone). The succession records two glacial advances within the Ammar Formation and the subsequent deglaciations. Organic-rich black shales (Batra Formation) form part of the final deglacial transgressive succession that in-filled an existing low stand glacial continental shelf topography. The base of the black shale is coincident with the maximum flooding surface. During transgression, interfluves and sub-basin margins were breached and black shale deposition expanded rapidly across the region. The top of the black shales coincides with peak highstand. The “expanding puddle model” (sensu Wignall) for black shale deposition, adapted for the peri-glacial setting, provides the best explanation for this sequence of events. We propose a hypothesis in which anoxic conditions were initiated beneath the halocline in a salinity stratified water column; a fresher surface layer resulted from ice meltwater generated during early deglaciation. During the initial stages of marine incursion, nutrients in the monimolimnion were isolated from the euphotic zone by the halocline. Increasing total organic carbon (TOC) and δ13Corg up section indicates the organic carbon content of the shales was controlled mainly by increasing bioproductivity in the mixolimnion (the Strakhov model). Mixolimnion nutrient levels were sustained by a continual and increasing supply of meltwater-derived nutrients, modulated by obliquity changes in high latitude insolation. Anoxia was sustained over tens to hundreds of thousands of years. The formation of black shales on the north Gondwana shelf was little different to those observed in modern black shale environments, suggesting that it was the nature of the Ordovician seas that pre-disposed them to anoxia.last_img read more

#DestinationDell Hits the Road to Visit Our Customers’ Future

first_imgOne of my favorite aspects of being senior vice president of North America Field Marketing at Dell EMC is hosting customers weekly in our Executive Briefing Centers where we can sit down together to talk about the day-to-day needs of a business, learn more about our customers’ goals and help bring to life the technology solutions that will work best for them. The meetings also give our customers a great opportunity to get their hands on the client products to experience them firsthand.Given the value of these meetings, I’m proud to announce the wheels are rolling on Destination Dell, our new mobile Executive Briefing Center hitting the road to visit our customers around the United States. We’re beginning with a 40-stop tour of the west coast, with visits to Seattle, Portland and the Bay Area, including a visit to Intel, our Destination Dell partner, on-the-ground in Santa Clara.So what is Destination Dell? Imagine an RV fully wrapped in the city skyline of our hometown, Austin, Texas, equipped inside with our top-of-the-line commercial products and demos to bring to life our technology solutions. There’s also a conference room fully equipped with Intel Unite, along with an architecture-based VR experience, an outdoor lounge area and often a “best-of” local food truck. Our customers will get a chance to step inside and see what the future workforce will look like as we help them adapt their business to be ready for what’s coming – and our hope is that they’ll have some fun while doing it, too.Why now? There are critical shifts occurring in the way people work and what makes them happy. Based on what we know from our Future Ready Workforce study, it’s important for our customers to have these conversations now. As part of our research we learned:More than 50 percent of employees expect to be working in a smart office in the next five yearsMore than 80 percent of millennials say workplace tech would have an influence when deciding to take a jobHalf of all employees, and three in five millennials, believe technology will make face-to-face conversation obsolete in the near futureMore than 60 percent of millennials would rather receive high tech perks at work versus low tech perks like ping pong and free foodThere is so much to consider about technology in business these days so we’re taking to the open road to make sure our customers feel ready and excited about the future of their solutions. Follow the journey of #DestinationDell and if you have questions, you can reach out to [email protected]last_img read more

Update on the latest sports

first_imgUpdate on the latest sports Michigan’s policies include the elimination of season tickets for the 2020 season. VIRUS OUTBREAK-TENNESSEETennessee reports multiple positives among athletesKNOXVILLE, Tenn. (AP) — The Tennessee Volunteers report multiple positive results for COVID-19 after the university ran a batch of tests last week.The tests were conducted after the Fourth of July holiday weekend. A spokesman confirmed Wednesday that the positive tests spanned “multiple sports.” Share This StoryFacebookTwitteremailPrintLinkedinRedditNFL-NEWSTitans, Henry work out new contract…Prescott remains taggedUNDATED (AP) — The NFL’s reigning rushing leader has a new contract. The Dallas Cowboys’ starting quarterback does not. NBA-PACERS-OLADIPOOladipo rethinking decision to sit out rest of seasonORLANDO, Fla. (AP) — Indiana Pacers guard Victor Oladipo (oh-lah-DEE’-poh) is having second thoughts about calling it a season, saying the workouts in Orlando, Florida, have forced him to rethink his decision. Oladipo said less than two weeks ago that he would sit out because of concerns over his surgically repaired right knee. His presence could give the Pacers a big boost when the season resumes, especially with starting guard Malcolm Brogdon also expected to be healthy.NASCAR-ALL-STAR RACEWallace bumped from contention NHL-AWARDSAdams, Calder finalists announcedNEW YORK (AP) — The NHL has announced the finalists for the Jack Adams Award and the Calder Trophy. Columbus’ John Tortorella, Philadelphia’s Alain Vigneault (VEEN’-yoh) and Boston’s Bruce Cassidy are up for the Adams Award, which goes to the Coach of the Year. Colorado’s Cale Makar (mah-KAHR’), Vancouver’s Quinn Hughes and Chicago’s Dominik Kubalik (koo-BAH’-lihk) are the finalists for the Calder Trophy as the top rookie. WNBA-DELLA DONNE-VIRUS OUTBREAKDelle Donne hurt that request denied by panel of doctors UNDATED (AP) — The New York Mets are breathing a sigh of relief after learning their top pitcher should be fine.A person familiar with the situation tells The Associated Press that an MRI on two-time Cy Young Award winner Jacob deGrom showed nothing to be concerned about. DeGrom was examined after leaving Tuesday’s intrasquad start after just one inning because of a sore back.Any significant injury to deGrom would be an enormous blow to New York during a season shortened to 60 games by the coronavirus. The right-hander had been scheduled to start on opening day July 24 against Atlanta. The Mets are spending the season without No. 2 starter Noah Syndergaard (SIHN’-dur-gahrd) due to Tommy John surgery.Meanwhile, Chicago Cubs manager David Ross says it’s too early to talk about first baseman Anthony Rizzo starting the season on the injured list. An MRI on Tuesday showed rib-head inflammation on Rizzo’s left side that is causing spasms, a condition he has dealt with before in his career. Tennessee previously had two basketball players test positive, with both clearing quarantine. COLLEGE SPORTS-WISCONSINWisconsin to don black “W”MADISON, Wis. (AP) — The University of Wisconsin plans to have its sports teams wear a university crest logo with a black “W” to show solidarity with Black and other underrepresented communities on campus.School officials said the change would take effect whenever Wisconsin sports teams return to action. They said the black “W” is meant to show support, inclusion and unity from Wisconsin athletes, the athletic department and the university as a whole. The Tennessee Titans have agreed to a new contract with Derrick Henry just before today’s deadline. The team announced only that it was a multi-year extension, but ESPN.com says it’s a four-year package worth up to $50 million with $25.5 million guaranteed. The Titans had to sign him Wednesday or let him play this season under the $10.2 million franchise tag he signed April 2.Henry ran for 1,540 yards and 16 touchdowns during the 2019 regular season before pouring it on in the playoffs, averaging 149 yards in three games.Dak Prescott is set to play the upcoming season under the franchise tag after failing to work out a deal with the Cowboys before the Wednesday afternoon deadline.The two sides have been working for more than a year on a long-term contract for a two-time Pro Bowler who has started every game of his career. In other MLB camp news:— Yankees right fielder Aaron Judge homered in an intrasquad game Wednesday after missing five days due to a stiff neck. The team also says right-hander Masahiro (mah-sah-HEE’-roh) Tanaka is scheduled for a bullpen session Thursday, his first action since he was struck on the head by a liner off the bat of Giancarlo Stanton on July 4.— Astros manager Dusty Baker doesn’t expect reliever Joe Smith to play for them this season. Smith has not reported to camp because of what general manager James Click called concerns for the safety of his family. Smith was placed on the restricted list Tuesday night, but he has not said publicly if he is opting out of the season— The Red Sox have placed left-handers Eduardo Rodríguez, Josh Taylor, and Darwinzon Hernandez on the injured list while they recover from COVID-19. Rodríguez won 19 games last year and had been the team’s likely opening day starter. The pitchers are eligible to be activated as soon as they have cleared the protocol, but they have not been able to participate in team workouts and would need time to prepare for the season.— Rangers outfielder Willie Calhoun is expected to miss the start of the season because of a hip strain. Calhoun has been ready to play again after recovering from a broken jaw sustained in a spring training game more than four months ago. July 16, 2020center_img — The Denver Broncos are telling season ticket holders that Empower Field at Mile High won’t be at full capacity this season because of the coronavirus outbreak. Face masks will be required if local officials allow a limited number of fans to attend games to maintain social distancing.— The Green Bay Packers say they won’t admit fans to any training camp practices or preseason home games due to the pandemic. This also applies to the annual Packers Family Night, an annual event that features a practice and other activities.— A domestic violence complaint against former Jacksonville Jaguars linebacker Blair Brown has been dismissed. According to the complaint filed in May 2019, Brown pointed a gun at his wife and threatened to kill her. He also was accused of pushing her to the ground, kicking her in the abdomen and punching her in the face after a verbal altercation in April 2019.MLB-NEWSDeGrom, Rizzo dealing with back issues. Clint Bowyer was named winner of the fan vote.VIRUS OUTBREAK-COLLEGE FOOTBALL-MICHIGANMichigan to allow fewer fans, or none at allANN ARBOR, Mich. (AP) — The University of Michigan says fewer fans, if any, will attend games at “The Big House” if the Wolverines play college football games this year.The athletic department says a final decision will be made after conferring with medical experts, the school’s leadership and the Big Ten Conference, along with government officials and agencies. Associated Press Prescott signed his $31.4 million contract in June. The 2016 NFL Offensive Rookie of the Year earned slightly more than $4 million total in the four years of his rookie contract after being drafted in the fourth round.Kansas City defensive end Chris Jones worked out a pact before the deadline. He and Henry are the only players to sign a new deal among the 14 players who received a franchise tag.Elsewhere in the NFL:— Browns defensive end Myles Garrett’s has signed a five-year, $125 million contract extension on Wednesday, making the talented edge rusher the NFL’s highest-paid defensive player. The deal includes $100 million guaranteed, according to NFL Network. Garrett received a six-game suspension last season after ripping a helmet off of Steelers quarterback Mason Rudolph and striking him in the head with it.— Philadelphia officials have clarified their ban on public events, opening up the possibility the Eagles would be allowed to have fans in the stadium if the city changes its rules before or during the season, assuming the NFL plays games this season. The city on Tuesday banned all large public events that require public permits through February 2021. Teams will be permitted to play without fans in Philadelphia. BRISTOL, Tenn. (AP) — Chase Elliott has joined his father as winner of NASCAR’s annual All-Star race, earning the $1 million prize in front of limited spectators at Bristol Motor Speedway.Elliott won the second and third stages of the event and earned the right to choose which lane he wanted to restart for the final 15-lap sprint to the finish. He picked the outside lane and pulled buddy Ryan Blaney with him on the restart but was never challenged before beating Kyle Busch to the finish line.Bill Elliott won the race in 1986, the only year it was held at Atlanta Motor Speedway.Bubba Wallace was wrecked out of the qualifying race, ruining his shot of racing for the $1 million prize.One driver advanced into the All-Star race through a fan vote and Wallace had been leading when results were last updated by NASCAR a week ago. But he was no longer eligible to win the fan vote after he crashed 17 laps into Wednesday night’s qualifying race NEW YORK (AP) — WNBA MVP Elena Delle Donne is hurt that her request was denied to be medically excused for the season. The panel of independent doctors the league and union agreed upon to decide whether players should be medically excused deemed her not to be “high risk, and should be permitted to play in the bubble.” The league’s reigning MVP has battled Lyme disease since 2008 and thought she would be medically excused from playing this season by the panel. SOCCER-WORLD CUPWorld Cup schedule announced LONDON (AP) — FIFA (FEE’-fuh) has announced a 2022 World Cup schedule that will have four games every day in a 12-day group stage. Matches later in the tournament that go into extra time will extend past midnight in Qatar. Eight venues in close proximity to Doha will be used at the tournament, which will be played in 28 days rather than the 32 days used in Russia to minimize the disruption to the European season. HORSE RACING-BAFFERT SUSPENDEDTriple-Crown-winning trainer gets 15-day banLOS ANGELES (AP) — Two-time Triple Crown-winning trainer Bob Baffert has been suspended for 15 days by the Arkansas Racing Commission after two of his horses tested positive for a banned substance. Baffert-trained horses Charlatan and Gamine each tested positive for lidocaine in two rounds of testing after winning races at the Hot Springs, Arkansas, track on May 2. The commission said the suspension will run from Aug. 1 -15. NFL-OBIT-DAVID LEWIS Former NFL and USC player David Lewis dies at 65TAMPA, Fla. (AP) — A key member of the Tampa Bay Buccaneers’ 1979 team that reached the NFC title game has died at 65. David Lewis died in Tampa. The cause was not immediately known but USC said he had struggled with health issues in recent years. Lewis played college ball at USC. He was also among the defensive stars on the 1979 Buccaneers team that reached the NFC title game, capping the franchise’s “worst to first” transformation. The Bucs won 10 games that year after having won just seven in the franchise’s previous three seasons.last_img read more