COMPETING LAURENTIAN AND GONDWANAN SEDIMENT SOURCES DURING PROTRACTED PANGEA ASSEMBLYIN THE MARATHON REGION OF WEST TEXAS

2018 ◽  
Author(s):  
Nicholas D. Perez ◽  
◽  
Zihui Gao
Keyword(s):  
Sediment Sources ◽  
West Texas

Competing sediment sources during Paleozoic closure of the Marathon-Ouachita remnant ocean basin

2019 ◽  
Vol 132 (1-2) ◽  
pp. 3-16 ◽  
Author(s):  
Zihui Gao ◽  
Nicholas D. Perez ◽  
Brent Miller ◽  
Michael C. Pope
Keyword(s):  
Ocean Basin ◽  
Sediment Provenance ◽  
Thrust Belt ◽  
Sediment Sources ◽  
Volcanic Arc ◽  
Delaware Basin ◽  
Continental Scale ◽  
Sediment Routing ◽  
West Texas ◽  
Fold And Thrust Belt

Abstract The Paleozoic construction of Pangea advanced southwestward from the Appalachian system to the Marathon fold-and-thrust belt in west Texas and progressively closed a remnant ocean basin between Laurentia and Gondwana. The resulting collisional orogen was a potential driver of Ancestral Rocky Mountain tectonism and impacted continental-scale sediment routing. New detrital zircon U-Pb geochronologic and heavy mineral provenance data from Ordovician–Pennsylvanian strata in the Marathon fold-and-thrust belt, and Permian strata in the Guadalupe Mountains of west Texas record changes in sediment provenance during the tectonic development of southwestern Laurentia and the Delaware Basin. In the Marathon fold-and-thrust belt, Ordovician rocks (Woods Hollow and Marathon Formations) record peri-Gondwanan sediment sources prior to continent collision. Syncollisional Mississippian and Pennsylvanian rocks (Tesnus, Haymond, Gaptank Formations) record contributions from distal Appalachian sources, recycled material from the active continental suture, and volcanic arc material from Gondwana. Near the Guadalupe Mountains, postcollisional Permian strata (Delaware Mountain Group) from the northern Delaware Basin margin suggest a dominantly southern catchment that was sourced from the deforming suture and Gondwanan arc. The results demonstrate that both plates and the active suture zone were sources for the siliciclastic wedge, but their proportions differed through time. These results also suggest that the delay between initial late Mississippian suturing in the Marathon region and increased mid-Permian siliciclastic deposition into the northern Delaware Basin may have been linked to a southward catchment expansion that integrated the collisional belt and southern volcanic arc into a broadly north-directed sediment dispersal system.

SARS-CoV-2 and The Case for Empirical Treatment (Preprint)

2020 ◽  
Author(s):  
Richard P Bartlett ◽  
Alexandria Watkins
Keyword(s):  
Diabetes Mellitus ◽  
Type Ii Diabetes ◽  
The United States ◽  
Type Ii Diabetes Mellitus ◽  
Outpatient Setting ◽  
Empirical Treatment ◽  
Residual Effects ◽  
Type Ii ◽  
West Texas

UNSTRUCTURED Background: This is an outpatient case study that examines two patients in the United States with unique cases that involve oncology, hypertension, Type II Diabetes Mellitus, and Severe Acute Respiratory Syndrome Coronavirus-2 (SARS-CoV-2), also known as COVID-19. This case study involves two patients in the outpatient setting - treated via telemedicine, with laboratory-confirmed SARS-CoV-2 infection in the West Texas region between March 29th, 2020, and May 14th, 2020. Case Report: The first patient is a 63-year-old female, non-smoker, who is diagnosed with Waldenstrom’s Macroglobulinemia (2012) and Primary Cutaneous Marginal Zone Lymphoma (2020) and the second patient is a 38-year-old male, non-smoker, who has the following comorbidities: Type II Diabetes Mellitus (DM), hypertension, and gout. Both patients were empirically started on budesonide 0.5mg nebulizer twice daily, clarithromycin (Biaxin) 500mg tab twice daily for ten days, Zinc 50mg tab twice daily, and aspirin 81mg tab daily. Both patients have fully recovered with no residual effects. Conclusion: The goal is to call attention to the success of proactive, early empirical treatment, combining a classic corticosteroid (budesonide) administered via a nebulizer and an oral macrolide antibiotic known as clarithromycin (Biaxin).

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