TRIVALENT/ත්රිසංයුජ
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Item The First Record of The Archeoastronomical Bind Rune Associated with Petroglyphs in Danigala Circular Rock, Sri Lanka(Journal of Archaeology, Tourism & Anthropology, 2020) Sumanarathna, Aravinda Ravibhanu; Aouititen, Majda; Taylor, Bernie; Sameera, Geeth; Katupotha, Jinadasa; Bandara, ArunaDanigala Rock is a unique geological site situated near Kandegama at Polonnaruwa district. The aerial view of the rock shows a semi-circular shape, which was affected by geological weathering. The northwest slope part of Danigala inselberg has interesting petroglyphs discovered in Chithra Lena (7°41'0.44"N | 81°12'45.66"E). These symbols are relatively new and, for the first time, discovered in Sri Lanka during an archaeoastronomical survey conducted by Eco Astronomy Sri Lanka in a corporation with Central Cultural Fund (Polonnaruwa-Alahana Parivena Project). These petroglyphs, now perceived and assessed as art, are mute science prints of ancient cultural vestiges of a bygone society. The predominant forms found are partially similar with few forms found in some sites in Sri Lanka, but with distinct differences in the engraving process. Notably, samples of the bind rune coding of Danigala petroglyphs are quite similar to bind rune’s symbols of Shamanic cultures. Besides, the engraving technique is remarkably similar to the technique used in the petroglyphs of Edakkal Caves in India. This paper is an attempt to document and analyze this bind rune coding in purpose to uncover the archaeo-astronomical meaning and the historical beliefs.Item Comparative Systematic Analysis of Milankovitch Cycles to Identify Variations of Glaciers and Interglacial Periods of Late Pleistocene in South Asia(Department of Archaeology, University of Kelaniya, 2020) Ravibhanu, Aravinda; Katupotha, Jinadasa; Aouititen, MajdaVariations in the first Euler angle known as Earth precession phenomenon which is described as a change in the Earth’s orbit; found to have strong impact on the climate of Earth. These observations of climate changes were connected with the behavior of the global ice sheets, including their advancing and retreating movements which have been recorded. In fact, Earth’s climate depends essentially on the cycle of glaciers' growth and reduction. The alternative glacial periods and the interglacial periods coincide with the variations in Earth’s orbit known as “Milankovitch cycles”, which affect the insolation, and the sunlight exposure of different regions of the world and thus ultimately the behavior of ice formation. This paper aims to document the variations of the Earth’s axis orientation and to discuss how these changes have affected to the sea-level fluctuation of the South Asian Region during late Pleistocene. Experiment methodology consists of compelling a standardized dataset of the sea-level index (Data SET 01-Radiocarbon Journal, Katupotha. J, Data SET 02- SEAMIS database and selected 35 number of carbon dating values recorded and published in the literature of the South Asian Region) and then compare it with the data of Milankovitch Cycles. The discussed results show that the sealevel variations occurred mainly between 12,500 ± 1,500 YBP to 11,000± 1,500 YBP, indicating that 25m ± 5m recorded to be the lower sea level documented than the current sea level found around the South Asian region. This has been resulted by a quick glacier transition that happened in the Late Pleistocene.