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Configuration of the northern Antarctic Peninsula Ice Sheet at LGM based on a new synthesis of seabed imagery

first_imgWe present a new seafloor map for the northern Antarctic Peninsula (AP), including swath multibeam data sets from five national programs. Our map allows for the examination and interpretation of Last Glacial Maximum (LGM) paleo-ice sheet/stream flow directions developed upon the seafloor from the preservation of: mega-scale glacial lineations, drumlinized features, and selective linear erosion. We combine this with terrestrial observations of flow direction to place constraints on ice divides and accumulation centers (ice domes) on the AP continental shelf. The results show a flow bifurcation as ice exits the Larsen-B embayment. Flow emanating off the Seal Nunataks (including Robertson Island) is directed toward the southeast, then eastward as the flow transits toward the Robertson Trough. A second, stronger “streaming flow” is directed toward the southeast then southward, as ice overflowed the tip of the Jason Peninsula to reach the southern perimeter of the embayment. Our reconstruction also refines the extent of at least five other distinct paleo-ice stream systems which, in turn, serve to delineate seven broad regions where contemporaneous ice domes must have been centered on the continental shelf during the LGM time interval. Our reconstruction is more detailed than other recent compilations because we followed specific flow indicators and have kept tributary flow paths parallellast_img read more

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Argonauts Clinch GSC East #2 Seed in Sunday Sweep

first_img Share Argonauts Clinch GSC East #2 Seed in Sunday Sweep April 29, 2007Box Score HUNTSVILLE, Ala. – West Florida completed their April comeback on Sunday afternoon at the Charger Softball Complex. With their 5-1 win over 10th ranked Alabama-Huntsville, West Florida earned the Gulf South Conference East number two seed for next weekend’s conference tournament. It was also a historic day for the Argonauts as West Florida (34-23, 14-10 GSC) completed their first double header sweep over the Chargers in Huntsville. Alabama-Huntsville (40-16, 13-10) will be the GSC East third seed for the GSC Tournament.”I firmly believe that we are finally playing to our potential,” said head coach Tami Cyr. “Our backs were against the wall and we came through this weekend.”After standing in next-to-last place on Apr. 11, West Florida is the GSC East Division second seed for next weekend’s GSC Tournament. West Florida will face the GSC West third seed Henderson State (26-13) on Friday at 11:45 a.m. CST. The tournament will be held at the Greenbrook Softball Complex in Southaven, Miss. Last season, the Argonauts went 2-2 at the tournament and were eliminated by Henderson State in the quarterfinals.Alabama-Huntsville took an early lead in the bottom of the second inning on a two out, RBI single by Megan Blanchard. But West Florida answered with a run in the top of the third inning. Kat Sheppard (Gulf Breeze, Fla./Milton HS) led off with a single, and pinch-runner Franny Bell (Navarre, Fla./Navarre HS) advanced to second on Melissa Chastang’s (Saraland, Ala./Satsuma HS) sacrifice bunt. Bell came around to score on Whitney Gay’s (Cantonment, Fla./Tate HS) two out, RBI single.West Florida took their first lead of the game on Nicky VanCamp’s (Davenport, Iowa/Kirkwood CC) lead off home run in the top of the fourth inning. It was VanCamp’s team-leading seventh home run of the season. Alabama-Huntsville put runners at second and third with one out in the bottom half of the inning, but West Florida starting pitcher Taren Walton (Pensacola, Fla./Daytona Beach CC) ended the inning with two groundouts.”I knew they (Alabama-Huntsville) were a great offensive team,” said Walton. “I wanted to shut down their power hitters while limiting their offensive potential.”West Florida increased their lead with three runs over the last two innings. Van Camp doubled to lead off the top of the sixth inning, and pinch-hitter Dawnyele Stapleton (Navarre, Fla./Navarre HS) was sacrificed to third by Valerie Staub (East Brunswick, N.J./Wallace-Dothan CC). With two outs, Heather Bell (Bradenton, Fla./Bayshore HS) reached on a two-base error, allowing Stapleton to score. Bell eventually advanced to third and scored on Chastang’s RBI single. West Florida completed the scoring in the top of the seventh inning on Staub’s RBI single down the left field line.Walton (17-8) won her sixth consecutive start after limiting Alabama-Huntsville to one run on six hits with a walk and three strikeouts. Courtney Hudson (5-4) suffered the loss after allowing five runs (three earned) on 12 hits with four strikeouts. VanCamp led West Florida with three hits.”I am so proud of this team,” said Cyr. “This team is made up of great people, and I have always believed in them. “They are a group of winners that never gave up.””Live Stats” and live broadcasts will be available for all of the Argonauts games at the GSC Tournament. Go to the softball page at www.goargos.com to follow all of the action at the tournamentPrint Friendly Versionlast_img read more