Purpose

Connects deep‑time concepts to practical field workflows you can apply in specific projects.

1) Stratigraphic framework

• Define objectives and expected temporal resolution.
• Map key surfaces: sequence boundaries, flooding surfaces, maximum flooding.
• Collect correlation tools: ash beds, distinctive lithologies, marker fossil horizons.

2) Sampling and measurements

• Hand samples and oriented blocks for paleomag.
• Bulk carbonate and organic samples for δ13C, δ18O, and trace metals.
• Detrital zircon for maximum depositional ages and provenance.
• Paleosol profiles for paleo‑pCO2 and climate indicators.

3) Age‑model construction

• Prioritize datums: radiometric ages, magneto‑polarity reversals, bioevents.
• Use astrochronology where rhythmic bedding is present.
• Propagate uncertainties; present preferred and alternate correlations.

4) Environmental reconstructions

• Redox: Fe speciation, U–Mo–V, I/Ca.
• Paleotemperature: clumped isotopes, TEX86, Mg/Ca.
• Water column structure: Nd isotopes, Sr isotopes, biomarker assemblages.

5) Synthesis products