Explicit instruction with rhetorical analysis---recognizing statements which:
include an observation, or description of an observation
name or classify an observation in terms of geological features
describe a feature that has been observed and classified, or that the author implies has been observed and classified, even if supporting observations are lacking
describe relationships between different observed and classified features
describe or explain a model or theory
describe relationships between and/or observed features that match (or disagree with) model features