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. 2012 Sep 19;7(9):e45537. doi: 10.1371/journal.pone.0045537

Table 1. Stable isotopic ratios of amber and cellulose extracted from Metasequoia wood entombed in the Panda kimberlite.

Measurement Minimum Maximum Mean ±1 s.d. n
Amber δ2H (‰ VSMOW) −371.09 −363.90 −368.95 2.59 6
Cellulose δ2H (‰ VSMOW) −165.06 −156.34 −160.54 3.78 4
Inferred δ2Henvironmental water (‰ VSMOW)1 −143.06 −134.34 −138.54 − −
Amber δ13C (‰ VPDB) −25.17 −24.56 −24.83 0.22 6
Cellulose δ13C (‰ VPDB) −19.84 −19.65 −19.74 0.13 2
Cellulose δ18O (‰ VSMOW) 18.52 18.75 18.61 0.12 4
Inferred δ18Oenvironmental water (‰ VSMOW)2 −16.48 −16.25 −16.39 − −
1

using εcellulose-environmental water = −22‰ [24].

2

using εcellulose-environmental water = 35‰ for Metasequoia [31].