Nature - 15.08.2019

Letter reSeArCH

0.2–0 Gyr, modern

0.85–0.2 Gyr,

Pangea

1.4–0.85 Gyr,

Rodinia

2.2–1.4 Gyr,

Columbia

>2.2 Gyr,

Super Cratons

Frequency

Age (billions of years before present: Gyr)

0 0.5 1 1.5 2 2.5 3 3.5 4

0

10

20

30

40

50

Extended Data Fig. 1 | Distribution of ages of metamorphism. The
distribution of ages of metamorphism is characterized by peaks at
about 2.6, 1.9, 1.0, 0.5 and <0.2 Gyr ago. For the statistical evaluation of

metamorphic data presented in this paper, the data were binned about

each of these discrete peaks to provide more statistically robust (with

higher number of data points) interpretations.