Part 3. true/false. 2 points each. ltfcrystals that grow next to one but do not share atoms are not considered to be twins. 2. t f the continuous side of bowen's reaction series starts with potassium feldspar and ends with na-rich plagioclase and has solid solution. 3. tfthe depth of formation of an intrusive rock has little effect on textures seen in 4. t fmetamorphism includes changes that occur to rocks under surface or near- 5. t f in dunham's classification, a limestone that is grain-supported and has mud the rock. surface conditions. matrix is called a packstone. 6. tfgranites found at the surface formed from volcanic eruptions. 7. tfbecause of the temperature at formation, sedimentary rock are more likely to metamorphose than igneous rocks.