article_snippet: The extremely unlikely formation theory was reached after scientists re-analysed rocks at the site, and found dates for the two were vastly different.
article_snippet: But the researchers say the original methods used to date the East lake, by measuring amounts of argon-40, were inaccurate.
article_snippet: A similar figure was reached by researchers in 1990 by a separate research team, but at the time the findings were dismissed as incorrect due to a supposed contamination from excess argon.
article_snippet: But with four different rock samples from various parts of the East lake now studied, the researchers say it is highly unlikely the researchers would all yield the same false age. '
article_snippet: Overall, the doublet theory has been so compellingly advocated over the decades that alternative scenarios seem to have been abandoned,' said Dr Schmieder. '
article_snippet: In our view, there is a whole line of geologic evidence that argues against the double impact.'