What do Basalts, Andesites and Rhyolites have in common? answers. a. Their textures - they all result from molten material erupting to the surface and cooling quickly. b. Their composition - they will all have the same mineral composition. c . Their color - they will all be dark in color d. Their color - they will all be light in color 2. if you find a rock containing glassy quartz it will be: Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a. Basalt if it is fine grained, Gabbro if it is coarse grained. b. Andesite if it is fine grained, Diorite if it is coarse grained. c. Rhyolite if it is fine grained, Granite if it is coarse grained 3. Which two rocks are the primary rocks that forms when ocean crust melts and mixes with continental crust? select an answer. a. Basalt / Gabbro b. Andesite / Diorite c. Rhyolite / Granite .