1 of 4

9,000

Years Ago

18,000

Years Ago

6,000

Years Ago

12,000

Years Ago

3,000

Years Ago

21,000

Years Ago

2 of 4

Mg/Ca

5.0

Mg/Ca

5.6

Mg/Ca

4.2

Mg/Ca

3.8

Mg/Ca

5.7

Mg/Ca

4.6

3 of 4

Printing Help

  • 21,000 years ago to 3.8 Mg/Ca
  • 18,000 years ago to 4.2 Mg/Ca
  • 12,000 years ago to 4.6 Mg/Ca
  • 9,000 years ago to 5.0 Mg/Ca
  • 6,000 years ago to 5.6 Mg/Ca
  • 3,000 years ago to 5.7 Mg.Ca
  • Print 2 sided short-edge for these to make cards

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4 of 4

15,000

Years Ago

10,000

Years Ago

5,000

Years Ago

20,000

Years Ago