For example, only about half (49%) of Millennials say the phrase “a patriotic person” describes them very well—with 35% saying this is a “perfect” description. 13 By contrast, 64% of Gen Xers, 75% of Boomers and 81% of Silents say this describes them very well. This gap may be due more to their age and stage in life than a characteristic of their generation. When Gen Xers were young, they too lagged behind their elders on this measure in a similarly worded question. 14 Millennials are also somewhat less likely than older adults to describe themselves as environmentalists—just 32% say this describes them very well, compared with at least four-in-ten among all older generations.
Chemical sedimentary rocks are derived from material carried in solution to lakes and oceans. Under certain conditions, the dissolved material precipitates out of solution and, thus, settles to the bottom. Precipitation may occur due to physical processes such as evaporation or through living organisms. For example, limestone is the most abundant chemical sedimentary rock, and it's typically formed when calcite precipitates due to evaporation. Calcite is produced by living organisms to form shells which can, in turn, form sedimentary rocks. Now, interestingly, 90% of limestone is of this biological origin.