zo 46 wo = 12 ~ 3 ~ 3 L an: oO $r9° FALLOUT CHICAGO MILKSHED AREA 4 0 { 19953 54 100 -— = | 55 | j 56 57 — PF Pot | J PF Po (DATE) tot ft tot pbb be 1000 —_— — ~ s- t z ° - 89 o TOTAL SKELETAL Ca g BOF | tan \ 3° — | + AS A FUNCTION OF AGE 7 B00 z E me Wy \ | rt) ERATE OF DEPOSITION OF SKELETAL =~ {Ca AS A FUNCTION OF AGE 8 —} 600 . + w a ", 40 3 oO a | 400 a = lt a Oo _— ta % 20 ke —} 200 owl ttt! 0 2 4 tip 6 8 arin ee eee, ~ tt pp tt 10 AGE, YEARS 42 14 ty {6 —4 Pe, ~ — ‘8 20 Fig. 4——Rate of skeletal accretion in relation to rate of environmental contamina- 1.0 a ee ee ee ee ee ee e | ! “oti—— ACCRETION PLUS REMODELING AND EXCHANGE ‘\ 0.04 \ L but oO \eo--—- t———- ACCRETION | APPARENT FRACTION OF EQUILIBRIUM, Sr°%ca RATIO @ sr°° BONE DATA (KULPI pet tion. | 10 | | 20 30 | AGE, YEARS 40 | | 50 | {| 60 Fig. 5— Apparent fraction of equilibrium Sr®* /Ca ratio in relation to skeletal age. 295 d 70