Scroll Trench, also called Arc Trench, is a 25 ft (7. In Geometry, an arc is a closed segment of a Differentiable Curve in the two-dimensional plane; for example a circular A trench is a type of excavation or depression in the ground Trenches are generally defined by being deeper than they are wide (as opposed to a wider Gully or Ditch 6m) long by 9 ft (2. 7m) wide curved cutting into the Late Cretaceous (Santonian Age) Seaford Chalk formation at Stonehenge in England. Late Cretaceous (100mya - 65mya refers to the second half of the Cretaceous Period, named after the famous white Chalk cliffs of southern England The Santonian is a Faunal stage of the Late Cretaceous Epoch. Chalk (ʧɔːk is a soft white porous Sedimentary rock, a form of Limestone composed of the Mineral Calcite. Stonehenge is a Prehistoric Monument located in the English county of Wiltshire, about west of Amesbury and north of Salisbury England is a Country which is part of the United Kingdom. Its inhabitants account for more than 83% of the total UK population whilst its mainland Located within the (southern) Avenue, it begins as a shallow disturbance over Stonehole B (WA 3606) increasing in depth east-northeast as it scrolls-arcs to the East deeper, its final depth being unknown. British Archaeologists refine the general archaeological use of avenue to denote a long parallel-sided strip of land measuring up to about 30m in width open at either end and Scrollwork is an element of ornamentation and graphic design The various forms are named by their supposed resemblance to the edge-on view of a parchment scroll. This broad feature cuts perpendicular through Heelstone Ditch whose segment is missing there in its curved path towards Stonehole 96 (WA 163), the Heelstone. Heelstone Ditch is a roughly circular earthwork having steep sloping sides which end at a narrow flat base being approximately 4 ft (1 The Heelstone is a single large block of Sarsen stone standing within the Avenue outside the entrance of the Stonehenge earthwork close to the main road It is exceedingly deep (6 ft, 1. 8m) where it crosses just East passed the missing segment of Heelstone Ditch (average depth: 4 ft, 1. 2m). Entirely cut away is Heelstone Ditch's lower-half fill of Early Carboniferous (Arundian Age) High Tor Limestone and its upper-half fill of silted-in periglacial cryoturbated chalk. The Arundian is a Stage (geologic Age) of the Early Carboniferous ( Dinantian) Viséan Epoch. Limestone is a Sedimentary rock composed largely of the Mineral Calcite ( Calcium carbonate: CaCO3 Periglacial is an adjective referring to places in the edges of glacial areas normally those related to past Ice ages rather than those in the modern era In Gelisols ( Permafrost Soils, cryoturbation (frost churning refers to the mixing of materials from various horizons of the soil right down to the Scroll Trench's backfill soil is a mixture of both lithologies and stone chips of all Stonehenge period varieties, indicating it postdates their occurrences. Stratigraphic sequence runs Scroll Trench - Stonehole 97 - Heelstone Ditch - (southern) Avenue Bank, from most recent to earliest. Lt-Col William Hawley found Scroll Trench in his "Excavations at Stonehenge during the season of 1923";
Scroll Trench, eastward from Heelstone Ditch to the Heelstone, remains unexcavated to this day. The feature was dated by Office of Works' draughtsman Robert Newall as 7th-6th century BC, with a electrum stater coin. Electrum is a naturally occurring Alloy of Gold and Silver, with trace amounts of Copper and other metals The stater was an ancient coin of Greek or Lydian origin which circulated from about 700 BCE to 50 CE Hawley sought permission to fully examine it satisfactorily, and he sought assistance in stabilising Heelstone while investigating it, but neither were granted.