andesites

the volcanic island was primarily composed of dark andesites.

geologists studied the andesites to understand the island's formation.

the andes mountains contain extensive deposits of andesites.

we analyzed the andesites for their chemical composition.

the presence of andesites indicated a subduction zone setting.

erosion has weathered the andesites into rounded shapes.

the research focused on the origin of the andesites.

we found porphyritic andesites with large phenocrysts.

the andesites were dated using radiometric methods.

the landscape was dominated by steep slopes of andesites.

the team mapped the distribution of andesites in the region.