Introduction The Potomac Formation is a heterogeneous assemblage of ancient river deposits consisting chiefly of unconsolidated and poorly consolidated sands, silts, clays, and small amounts of gravel, along with localized zones of diamictons of uncertain origin. It is the dominant geologic unit in the City of Alexandria. It crops out or is close to the surface everywhere west of Old Town and D...

Dismemberment of the preglacial Teays Valley system and development of the present Ohio River valley began in late Tertiary or early Pleistocene. By Illinoian time the present Ohio River was largely established in its present course, except for its headwaters above mile 114, which still flowed northward. The Illinoian glacial advance into northwestern Pennsylvania caused diversion of this porti...

Karst landscape overview THE 52,830 ACRES OF MAMMOTH CAVE NATIONAL PARK are part of the South-Central Kentucky Karst, which is characterized by subterranean drainage to springs on major rivers. From the southeast to the northwest portion of the landscape (Figure 1), there is a gradient of decreasing maturity in karst development, which corresponds to the regional dip of the bedrock. The major c...

Addiction Research Centre1, Clinical Toxicology Department2, Cardiac Anaesthesia Research Centre, Emergency Department3, Mashhad University of Medical Sciences, Mashhad, Faculty of Pharmacy, and Pharmaceutical Sciences Research Centre, Tehran University of Medical Sciences4, Iranian Academy of Medical Sciences5, Tehran, Iran, Environmental Health Services, BC Centre for Disease Control, Vancouv...

The western Snake River Plain (WSRP) in southwest Idaho has been characterized as an intracontinental rift basin but differs markedly topography and style from other Cordilleran extensional structures structurally the down-warped lava plain of eastern Plain. To investigate mechanisms driving extension topographic evolution, we sampled granitoid bedrock Cretaceous Eocene-aged plutons mountainous...

Stone tools and mastodon bones occur in an undisturbed geological context at the Page-Ladson site, Florida. Seventy-one radiocarbon ages show that ~14,550 calendar years ago (cal yr B.P.), people butchered or scavenged a mastodon next to a pond in a bedrock sinkhole within the Aucilla River. This occupation surface was buried by ~4 m of sediment during the late Pleistocene marine transgression,...

Saied Hafizi Lotfabadi1, Daryoush Hamidi Alamdari2* and Behzad Mavaji Darban2 Author Affiliations 1Department of Internal Medicine, Shariati Hospital, Mashhad University Medical Sciences, Iran 2Surgical Oncology Research Center, Received: February 21, 2022 | Published: March 01, Corresponding author: Alamdari, Surgical Mashhad, DOI: 10.26717/BJSTR.2022.42.006723