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Dichotomous key, It is black color?, They are sedimentary rocks?, They are…
Dichotomous key
They have crystals?
Yes (Basalt, Pumita)
No (Limestone, Dolomite, Breccia, Conglomerate)
It is black color?
No effusive igneous (Pumita)
Yes extrusive igneous (Basalt)
They are sedimentary rocks?
No (Dolomite)
Yes (Limestone, Breccia and Conglomerate )
They are formed of big fragments of rocks?
Yes (Breccia and Conglomerate)
No (Limestone)
Is it formed by Minerals?
Yes Breccia
No Conglomerate
