Baylor College Medical School
Earth Science
Shields are composed of ________________;are evidence of_____________;and are significant to Precambrian time because_____________.
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greta r #218157
Last updated by
jill d #170087
Shields are composed of ________________;are evidence of_____________;and are significant to Precambrian time because_____________.
1) metamorphic rocks
2) the early continents
3) they formed during that time