As sediment is transported by wind, water, or ice, it is exposed to sunlight and zeroed of any previous luminescence signal.Once this sediment is deposited and subsequently buried, it is removed from light and is exposed to low levels of natural radiation in the surrounding sediment.and bank – enclosing an area some 91.7 metres in diameter.Uncharacteristically for a henge, the bank was on the inside of the ditch.is Stonehenge, where stones of extraordinary dimensions are raised as columns, and others are fixed above, like lintels of immense portals; and no one has been able to discover by what mechanism such vast masses of stone were elevated, nor for what purpose they were designed.” Stonehenge's first chronicler, Henry of Huntingdon, mused on ‘the how’ and ‘the why’ of its construction, and, nine centuries later, archaeologists are still trying to provide satisfactory answers to those two basic questions.
It is generally thought that they were ceremonial centres, where people would gather together to take part in religious rituals and other communal activities.
Discovery of Giant, Ultra-Deep Paleo-Reservoirs in the Tarim Basin and Geochemical Origin of Crude Oil, Guangyou Zhu, Feiran Chen, Na Weng, Haijun Yang, Huitong Wang, and Zhiyao Zhang, #10986 (2017).
Petroleum Geology of the Crow Indian Reservation, South-Central Montana, David A. Reservoir Optimization, Mechanical Stratigraphy, and Stress Field Orientation in the Woodford Shale SCOOP (South Central Oklahoma Oil Province) Play: A Case Study from Grady County, Oklahoma, Carlos Molinares, Muizz Matemilola, Jing Zhang, Henry Galvis, Daniela Becerra, Lenon Infante, and Roger Slatt, #10984 (2017). Effective Application of Inorganic Geochemical Data in Shale Resource Plays: A Case Study from the Appalachian Basin, Nahysa Martinez-Kulikowski, Milly Wright, and Andrea Reynolds, #10556 (2013).
In the past 15 years there have been significant advances in luminescence dating with the advent of single aliquot and grain analysis, and associated protocols with blue/green diodes that can effectively compensated for laboratory induced sensitivity changes (Murray and Wintle, 2003; Wintle and Murray, 2006; Duller, 2012) and render accurate ages for the past ca. Most recently, the development of protocols for inducing the thermal-transfer of deeply trapped electrons has extended potentially OSL dating to the 106 year timescale for well solar-reset quartz and potassium feldspar grains from eolian and littoral environments (Duller and Wintle, 2012).
Common silicate minerals like quartz and potassium feldspar contain lattice-charge defects formed during crystallization and from subsequent exposure to ionizing radiation.
Through geologic time, quartz minerals accumulate a luminescence signal as ionizing radiation excites electrons within parent nuclei in the crystal lattice.