SP-345 Evolution of the Solar
System
FIGURE 21.12.1.- infall pattern for
source clouds active during different time periods. The Infalling gas
from one source cloud will be dominated by one element. The mass of
infalling gas will be stopped when the dominant element is ionized;
i.e., in the cloud corresponding to the critical velocity value of
that element's band. For example, a Band II element reaches its
critical velocity at a value rion which falls within the
C cloud.
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