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15 cards from this deck
Approximately 3700-2000 BC
Cutting patterns into stone with sharp flint or obsidian edges
Round structures: stone, wood, mud, thatched roofs
Simplest megalithic tombs: 3-7 stone legs supporting 1-2 capstones
Approximately 170
Long stone passages to burial chambers, covered by earthen mounds
c. 3200 BC
Allows sunlight into chamber during winter solstice
Around 21 December
c. 4000 BC, largest Boyne Valley mound at 1.5 acres
Two passages: one east-facing, one west-facing
Stone courses project inward gradually until they meet as roof
The Boyne Valley
Aligned with sun at equinoxes (21 Mar & 23 Sep)
Small circular indentations, often in groups of three
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