Before the cliffs
One rock. Two histories.
The making of a rock and the shaping of a cliff belong to different chapters.
The Claron Formation preserves a sedimentary record. Today's cliffs and columns are later shapes in that rock. Compare the two chapters without treating the pictures as a reconstruction of a particular place.
01 / Making the rock
Sediment collects in a basin.
Lakes, streams and floodplains contributed deposits that became rock. The drawing gathers these settings into one simplified scene.
02 / Shaping the landscape
Layers become exposed.
Uplift and erosion set the stage for the modern landscape. Fractures and differences in resistance help shape the exposed Claron rock.
Both scenes reuse original BCC schematic illustrations. No measured thickness, geographic reconstruction, time scale or formation boundary is shown. Independent geologist review is not recorded.
Complete reading edition. All stages and answer notes are visible.
Ask which history you mean
“How old is it?” might ask when sediment accumulated, or when erosion isolated a column. These are different questions. A single age for the rock does not date its current outline.
A band is a starting point
In a drawing or photograph, note a broad band and whether it forms a ledge or slope. Keep the name of the rock unit as a question until you have supporting evidence. Color alone is not a geologic map.
Try it yourself
Separate the chapters.
Which question is about the making of the rock, rather than its present shape?
Read the choices and explanations in the answer notes below.
Choose an answer when interaction is available.
Answer notes · also included in print
- When did this opening separate two columns?
This asks about the later shaping of the landscape. - In what setting did this sediment accumulate?
Yes. This asks about the earlier depositional environment recorded in the rock. - Why is this column narrower at its waist?
This asks about the shape of exposed rock. It needs evidence about weathering and the material's resistance.
Sources travel with the story.
The lesson, diagrams and answer notes are inside this file. Links marked Online need a connection. Linked pages are not included and can change after this edition was saved.
HoodoosOnline
https://www.nps.gov/brca/learn/nature/hoodoos.htmNational Park Service · Bryce Canyon · Updated 2021-09-04 · Checked 2026-10-02
Deposition, uplift, weathering, erosion, ice wedging and the walls–windows–hoodoos teaching sequence.
Facts paraphrased through existing BCC educational text. No NPS photograph, illustration, logo or page reproduction included. A general process explanation, not a clock or a stability assessment for an individual formation.
Geodiversity Atlas: Bryce Canyon National ParkOnline
https://www.nps.gov/articles/nps-geodiversity-atlas-bryce-canyon-national-park.htmNational Park Service · Geologic Resources Division · Updated 2024-06-17 · Checked 2026-10-02
Claron Formation, Paunsaugunt Plateau setting, fractures and differential erosion.
Source facts and an explicit outbound link. No agency media copied. A regional introduction, not identification of rock units from color alone.
Artwork, rights & this edition
Making the rock — Original BCC vector artwork; reused from the copied geology field notes. Copyright retained; no new public license grant.
Shaping the landscape — Original BCC vector artwork; reused from the copied geology field notes. Copyright retained; no new public license grant.
Typography uses locally installed system fonts. No font files, third-party software, star data or source photographs are included.
Original BCC code and editorial adaptation. Copyright retained by the owner; no new public license grant. No rights claimed in U.S. Government source facts.
Version 1.0.1 · Content edition 2026-10-03. Answers stay only in this open page and reset when reopened. No service worker, tracking or automatic source updates.