In a previous post, I used an analysis of my Y chromosome DNA to trace the journey of my paternal ancestors from Y-chromosomal Adam, who lived in West Africa around 275,000 years ago (275 kya), to the founder of the R1b sub-haplogroup R-L23, who was born on the Caspian around 4,400 BC (6.4 kya). In this post, I continue my paternal ancestral journey to the most recently identified haplogroup founder: a Celtiberian living in what is now Portugal around 510 BCE. The sequence of Y SNPs defining my haplotree are shown in the following map. It summarizes this journey from R-L23 (4,400 BCE) to the most recent haplogroup founder (510 BCE), and continues on from the map published in the previous post.
There is an immense amount of recent research on European Bronze Age genetics and migrations and a very considerable unfinished debate on how to interpret the evidence. New evidence is being published almost weekly, as increasing numbers of ancient European remains are analysed and Y haplogroup identified. So this post will only aim to describe the big picture as best I can summarize it, and details and perhaps even some of the big picture will likely change in the future.
I recently had an opportunity to spend a weekend exploring Neolithic, Bronze Age and Iron Age sites on the Wessex Downs. Britain’s “oldest road”, the Ridgeway, runs 87 miles (137 kilometres) across the Wessex Downs eastward to the Berkshire Downs and the River Thames. It has been in use for over 5,000 years and I briefly visited it over 30 years ago.
West Kennet Long Barrow, an early Neolithic grave.
West Kennet Long Barrow
At the western end of the Ridgeway, a couple of miles from Avebury, I visited West Kennet Long Barrow which was built during the early Neolithic period around 3,650 BC. There are five stone burial chambers in the eastern end, and at least 46 people were buried here over a 1,000 year period. The entrance consists of a concave forecourt with a facade made from large slabs of sarsen stones which were placed to seal entry towards the end of its life.
Large sarsen stones guard the entrance to the Barrow