Three cores were recovered from an Oligo-Miocene sequence of rocks at offshore scientific drilling sites 1, 2, and 3. Figure 7 shows the logs of the recovered cores; each log displays several different lithologic units (rock units indicated by different drawing patterns). You can consider these units as "Formations", which are the basic units of geologic mapping (Maurrasse & Collins, 2015).Your task is to correlate the three core sites in figure 7. You must use the superposition and lateral continuity principles and focus on the core's lithology. For example, we identified a unit of sandstones at the bottom of site 1 and called it Unit A. We correlated the base and the top of unit A between sites 1 and 2; now, you can identify Unit A at Site 3 and extend the correlation. Identify, name, and correlate all the lithological units present at the core sites below.

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answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.