Table 1. SEM-EDS quantitative data for the fossil feather. Both black (Fig. 7) and brown (Fig. 8) regions of the feather are presented as weight (ms%) and molar (mol%) percentages in decreasing abundance. * indicates element not auto-detected by instrument.

Black	ms%	mol%	Brown	ms%	mol%
O	37.92	41.36	O	45.29	57.03
C	28.06	40.76	Si	19.12	13.72
Si	10.99	6.83	Al	9.53	7.11
Fe	9.90	3.09	Fe	8.39	3.03
Al	5.75	3.72	C*	7.30	12.24
Ca	2.20	0.96	Na	2.59	2.27