580
Mya dates the meteor strike at the start of the Gaskiers ice age (579.88 to 579.63 Ma).
Not exact matches
These TMRCAs were calculated for each bootstrap tree in r8s using the Langley - Fitch (LF) method and POWELL algorithm (84), by constraining the root height to 4.0 — 4.5
Mya (9) and fixing the
dates of CGG10022 and CGG10023 at 43 kya and 16.5 kya, respectively.
Stone tools were found at Gona in Ethiopia in the eaRly 1990s and reliably
dated to 2.6
mya.
Later in the decade, specimens
dated to 2.3
mya were found nearby at Hadar, the site where «Lucy», Australopithecus afarensis, was found in 1974.
We first calibrated the whole - exome phylogeny using the time to the most recent common ancestor (TMRCA) of Equus (donkey vs. horses) at 4.0 — 4.5
Mya (9) and tip
dates for ancient samples, assuming that the combined evolution of protein - coding genes follows a molecular clock (Fig. 2A).
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The eastern gray fox is deeply diverged from California foxes but this split must be younger than the oldest fossil
date for Urocyon so we set the root length to the early Pliocene Urocyon fossil
dating to 5.332 — 2.558
MYA [54].
First, the Permo - Triassic (PTr) boundary has been
dated precisely to 251 My ago (
Mya).