The Amundsen Sea Embayment (ASE) drains approximately 35% of the West Antarctic Ice Sheet (WAIS) and is one of the most rapidly changing parts of the cryosphere. In order to predict future ice sheet behaviour, modellers require long-term records of ice-sheet melting to constrain and build confidence in their simulations. Here, we present detailed marine geological and radiocarbon data along three palaeo-ice stream tributary troughs in the western ASE to establish vital information on the timing of deglaciation of the WAIS since the Last Glacial Maximum (LGM). We have undertaken multi-proxy analyses of the cores (core description, shear strength, x-radiographs, magnetic susceptibility, wet bulk density, total organic carbon/nitrogen, carbonate content and clay mineral analyses) in order to: (1) characterise the sedimentological facies and depositional environments; and (2) identify the horizon(s) in each core that would yield the most reliable age for deglaciation. In accordance with previous studies we identify three key facies, which offer the most reliable stratigraphies for dating deglaciation by recording the transition from a grounded ice sheet to open marine environments. These facies are: i) subglacial, ii) proximal grounding line, and iii) seasonal open marine. In addition, we incorporate ages from other facies (e.g., glaciomarine diamictons deposited at some distance from the grounding line, such as glaciogenic debris flows and iceberg-rafted diamictons and turbates) into our deglacial model. In total, we have dated 78 samples (mainly the acid insoluble organic (AIO) fraction, but also calcareous foraminifers), which include 63 downcore and 15 surface samples. Through careful sample selection prior to dating, we have established a robust deglacial chronology for this sector of the WAIS. Our data show that deglaciation of the western ASE was probably underway as early as 22,351 calibrated years before present (cal yr BP), reaching the mid-shelf by 13,837 cal yr BP and the inner shelf to within c.10-12 km of the present ice shelf front between 12,618 and 10,072 cal yr BR The deglacial steps in the western ASE broadly coincide with the rapid rises in sea-level associated with global meltwater pulses 1 a and 1b, although given the potential dating uncertainty, additional, more precise ages are required before these findings can be fully substantiated. Finally, we show that the rate of ice-sheet retreat increased across the deep (up to 1600 m) basins of the inner shelf, highlighting the importance of reverse slope and pinning points in accelerated phases of deglaciation.
Related Shows Straight White Men is Lee’s traditionally structured take on the classic American father-son drama. When Ed and his three adult sons come together to celebrate Christmas, they enjoy cheerful trash-talking, pranks, and takeout Chinese. Then they confront a problem that even being a happy family can’t solve: when identity matters, and privilege is problematic, what is the value of being a straight white man? Show Closed This production ended its run on Dec. 14, 2014 View Comments Young Jean Lee’s Straight White Men begins previews off-Broadway on November 7. The New York premiere, directed by the author, will play at the Public’s Martinson Theater through December 7 and officially opens on November 17. The cast includes Austin Pendelton, Pete Simpson, James Stanley and Gary Wilmes. Straight White Men
continue reading » 12SHARESShareShareSharePrintMailGooglePinterestDiggRedditStumbleuponDeliciousBufferTumblr A new study on the transition to credit visibility has found that the way consumers establish credit history can differ greatly based on economic background.The CFPB said it found consumers in lower-income areas are more likely than those in higher-income areas to become credit visible due to negative records such as a debt in collection. Consumers in higher-income areas are more likely than those in lower-income areas to establish credit history by using a credit card or relying on someone else. The study also found that the percentage of consumers transitioning to credit visibility due to student loans more than doubled in the last 10 years, the CFPB said.“It is no secret that lower-income consumers face challenges in the financial marketplace,” said CFPB Director Richard Cordray in a statement. “Today’s study shows that even at the beginning of their financial lives, they are faced with higher hurdles to gain access to credit, which hinders them from turning their version of the American dream into reality.”In 2015, CFPB said it estimated that 11% of adults in the United States, or about 26 million people, are credit invisible with no credit history at one of the three nationwide credit reporting companies. “Without a sufficient credit history, consumers face barriers to accessing credit or higher costs,” the CFPB said. “This issue disproportionately impacts consumers who are African American or Hispanic, and people who live in low-income neighborhoods. It can also impact some recent immigrants, young people just getting started, and people who are recently widowed or divorced.”
Technically there is Thursday night football on TV tonight, but there is no “Thursday Night Football” game on TV tonight. As was the case last week, the NFL has no “TNF” game on the Week 17 schedule. The final week of the 2019 season will begin and end on Sunday with a full slate of games.So the Thursday night football stage tonight belongs to Pittsburgh and Eastern Michigan in the Quick Lane Bowl on ESPN at 8 p.m. ET. As for the Week 17 NFL schedule, the league flexed its best game of the week to the only prime-time slot available. (There is no “Monday Night Football” in Week 17, either.) The Seahawks will host the 49ers on “Sunday Night Football” in the final game of the regular season and a matchup that will decide the NFC West title — not to mention its impact on the NFL playoff picture.Below is all you need to know about the rest of the Week 17 NFL schedule, including kickoff times and TV channels.NFL WEEK 17 PICKS: Straight up | Against the spreadIs there a ‘Thursday Night Football’ game tonight?There is not. The last “Thursday Night Football” game of the season was played a couple weeks ago, when the Ravens blew out the Jets. If you need your Thursday football fix during the holidays, the college bowl schedule offers two options. Miami and Louisiana Tech will play in the Independence Bowl at 4 p.m. ET, and Pittsburgh and Eastern Michigan will play in the Quick Lane Bowl at 8 p.m. ET. Both games will be broadcast nationally on ESPN.The NFL picks up its Week 17 schedule on Sunday, when all 16 games will be played at either 1 p.m. ET or 4:25 p.m. ET on CBS or Fox, with the exception being the Seahawks-49ers game at 8:25 p.m. ET on NBC.Below is the full schedule.NFL schedule Week 17Sunday, Dec. 29GameTimeChannelBrowns at Bengals1 p.m.Fox, fuboTVDolphins at Patriots1 p.m.CBS, fuboTVBears at Vikings1 p.m.Fox, fuboTVChargers at Chiefs1 p.m.CBS, fuboTVJets at Bills1 p.m.CBS, fuboTVPackers at Lions1 p.m.Fox, fuboTVSaints at Panthers1 p.m.Fox, fuboTVFalcons at Buccaneers1 p.m.Fox, fuboTVEagles at Giants4:25 p.m.Fox, fuboTVTitans at Texans4:25 p.m.CBS, fuboTVRedskins at Cowboys4:25 p.m.Fox, fuboTVSteelers at Ravens4:25 p.m.CBS, fuboTVColts at Jaguars4:25 p.m.CBS, fuboTVRaiders at Broncos4:25 p.m.CBS, fuboTVCardinals at Rams4:25 p.m.Fox, fuboTV49ers at Seahawks8:25 p.m.NBC, fuboTV