You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "who formulated the principles describing the layers of sedimentary rocks?" whose answer is Walther.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Nicolas Steno and sedimentary rock principles
Useful Output:

Doc 1: Steno's Principle of Lateral Continuity links identical rocks, explaining the history of separation by events. In 1669, Niels Stensen (1638-1686)
Doc 2: Discusses a basic principle in geology in which sedimentary rocks are laid down horizontally from oldest at the bottom to youngest at the top.
Doc 3: In the 1600's, Nicolas Steno developed four laws that describe how layers of rock and sediment behave, paving the way for other thinkers to
Doc 4: Steno's final principle is the “principle of lateral continuity,” which says that sediment layers spread out until they reach an obstacle that
Doc 5: Nicholas Steno studies rocks and developed geologic principles,which show the relationship between sedimentary rocks. The principle of superposition describes