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form not specified original
definition Particle form may take any or no value. For use in normative descriptions.
narrower
any form original
particle form indeterminate original
any form original
broader
form not specified original
definition Particle has some form, but it is not specified.
narrower
bladed original
equant original
oblate original
prolate original
bladed original
broader
any form original
definition Bladed group in Sneed&Folk, (1958), S/L is less than 0.7 and (L-I)/(L-S) is between 0.33 and 0.66.
narrower
bladed medium original
compact bladed original
very bladed original
bladed medium original
broader
bladed original
definition S/L is between 0.3 and 0.5 and (L-I)/(L-S) is between 0.33 and 0.66 Sneed&Folk, (1958).
compact bladed original
broader
bladed original
definition S/L is between 0.5 and 0.7 and (L-I)/(L-S) is between 0.33 and 0.66 Sneed&Folk, (1958).
equant original
broader
any form original
definition Particles are compact in Sneed & Folk (1958), ratio of S/L is greater than 0.7.
fibrous original
broader
strongly prolate original
definition Particles are so elongate they are fibrous.
oblate original
broader
any form original
definition Particles are in 'platy group' in Sneed&Folk, (1958), S/L is less than 0.7 and (L-I)/(L-S) is less than 0.33.
narrower
oblate medium original
slightly flattened original
strongly flattened original
oblate medium original
broader
oblate original
definition Particles are 'just platy' in Sneed&Folk, (1958), S/L is between 0.3 and 0.5 and (L-I)/(L-S) is less than 0.33.
particle form indeterminate original
broader
form not specified original
definition Particle form is uncertain or not categorizable, generally obscured by overprinting deformation, metamorphism, or alteration, but reason is not specified.