Vol. 6, 1920 
PETROLOGY: G. P. MERRILL 
461 
stone (1903) (a crystalline chondrite), states that the chondrules are 
always so firmly intergrown with the ground that it is often impossible 
to determine where the one leaves off and the other begins. In many 
instances, the enstatites of a chondrule extend out into the ground mass 
with which they are intergrown. As noted, the Hvittis stone is a crystal- 
line chondrite; this might suggest either a crystallization of the chondrule 
in situ or a case of secondary enlargement. In writing of the Shelburn 
stone, a grey chondrite, however, he says,^^ "Bach individual chondrule 
represents a structure of cooling and crystallization from a molten state, 
and as their structure shows an intimate relation to the boundary of the 
chondrule it must be supposed that each, at the time of its solidification,, 
was a separate unit. Because chondrules of the same chemical composition 
have a different structure, they must have been formed under different 
FIG. 14 
physical conditions. Since such a variety of conditions cannot have ex- 
isted in the narrow space in which the different structures now are met 
with, the chondrules must have accumulated after solidification." Such 
a condition is well shown in figure 14, from the stone of Cedar, Texas. 
Meunier^*^ basing an opinion apparently upon the theoretic work of M. 
Faye suggests the probability of the chondrules resulting from the sudden 
condensation of a cyclonic vapor. "II par ait difficile de ne pas admettre 
que les chondres sont aux roches de precipitation gazeuse ce que les dra- 
gees de Carlsbad et le fer en grains sont aux roches de precipitant aqueus 
* * * Conformement a la terminologie dont font usage les paleontologistes 
a propos du vent fossiles du soleil fossile, de la pluie fossile, on serait 
tente de les qualifier de cyclones photos pherique fossiles.'' This is con- 
ceivable, to the present writer, only in the case of radiate enstatite or mono- 
somatic forms. 
