The greater parts of Cavite are composed of volcanic materials, tuff, cinders, basalt, breccias, agglomerate and interbeddings of shales, and sandstones. The dormant and active volcanoes (Taal) are within these volcanic areas and have been the sources of volcanic materials which form the Tagaytay Cuesta. The drainage systems are deeply entrenched in the tuffs, eroding thin interbedded sandstones and conglomerate rocks which are the sources of little reserves of sand and gravel in the larger stream. Adobe stone quarries also flourish in the tuff areas.
Cavite coastal areas have marl and conglomerate sedimentary rocks and some igneous rocks which are prominent in the high, mountainous regions of western part of the province. Black sands are found in Kawit while Noveleta has its own salt products. Magallanes has gravel deposits while reserves of sand and gravel materials are found in Alfonso, Carmona, Gen. Emilio Aguinaldo, Naic, Ternate, Maragondon and Silang
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