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GA · Burke, Screven, Effingham

Savannah River Bluffs — Burke & Screven

Low-cost Hawthorn Group bluffs with realistic small-to-mid teeth.

Find odds
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Trophy odds
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Diversity
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Access ease
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Overall
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Geology you're buying

  • • Hawthorn Group
  • • Coosawhatchie Formation
  • • reworked Eocene
Age
Miocene · ~12–18 Ma

Parcel profile

Best parcel types: freshwater river frontage
Excavation effort: screen gravel
Legal clarity: mostly clear
Typical entry: $60,000 – $350,000

Why this zone works

  • The Hawthorn Group extends well into eastern Georgia and is exposed in cut bluffs along the Savannah River and its tributaries.
  • Property prices are the lowest in this atlas — sub-acre river frontage routinely under $100k.

Depth to phosphate / matrix — sub-zones

The fossil-bearing matrix does NOT lie at one depth across this zone. Sub-bands below come from USGS isopach + structure-contour maps.
SHALLOW · best sub-bandSurface to 50 ft — bed exposed in the bank.

Hawthorn Group / Coosawhatchie Fm (Miocene phosphatic clays) outcrop in scattered Savannah-River bluffs. Dips rapidly under Pleistocene sand on the broad coastal plain.

Sub-bandDepth (ft)PhosphatePracticality
Savannah River / Brier Creek bluff
Coosawhatchie phosphatic clay exposed in bluff faces with clear phosphate pebble lag.
Towns: Sylvania, Waynesboro, Girard
0–8outcropThe cliff feeds you — no digging.
Inland Burke / Screven / Effingham uplands
Hawthorn top dips under 20–50 ft of Pleistocene sand away from the river — uneconomic.
20–50deepBeyond practical excavation — needs a phosphate-style strip operation.
Open USGS phosphate map for this AOI →Georgia Geological Survey — Coastal Plain →GGS Bulletin 104 (Huddlestun) — Hawthorn in GA →

What you'll find on a well-chosen parcel

SpeciesCommon nameTypical maxFrequency
Hemipristis serraSnaggletooth1.8"common
Carcharhinus spp.Requiem sharks1.2"common
Galeocerdo spp.Tiger shark (extinct)1.4"uncommon
Otodus megalodonMegalodon (rare)3"trophy only

Watch-outs (be honest with yourself)

  • Honest assessment: trophy odds are noticeably below the Carolinas and Florida.
  • More dig-and-screen than walk-and-find.

Restrictions on excavation & collecting

  • GA private-land surface collecting is permitted; landowner permission rules.
  • State-owned navigable bottoms require permit consideration — collect on YOUR bank.

Listing checklist — what to verify on a parcel

  • ☐ Hawthorn or Coosawhatchie subcrop on USGS map
    Good: Th / Tc on the GA state geologic map.
  • ☐ Visible bluff exposure
    Good: ≥6 ft of exposed sediment in the bank.
  • ☐ Direct Savannah River or major tributary frontage
    Good: Brier Creek, Briar Creek, or mainstem Savannah.

Search anchors

Towns and sub-areas to anchor your MLS searches:
Waynesboro, GASylvania, GASardis, GAGirard, GA

Live listing searches

These open Zillow / Realtor.com / LandWatch with the right county and waterfront filters already set. Listings update daily — bookmark them.

Live listings — ranked for teeth

Pulled live from Realtor.com via RapidAPI · top results re-scored against Macrostrat / FEMA / CBRS evidence (same primitive as the dossier) · cached 30 min.
Pulling live listings…

    Score a candidate listing

    Found something on Zillow? Plug it in.
    Parcel type
    Address (for parcel-pinned dossier)
    Frontage: 150 ft
    Lot depth: 200 ft
    Asking: $60k
    Listing fit
    94
    great
    • ✓Parcel type matches zone — Listing parcel type fits Savannah River Bluffs — Burke & Screven.
    • ✓Active erosion / exposure on parcel — Listing shows an eroding cliff, bank, or exposed bar — the geology can deliver teeth.
    • ✓Shoreline not bulkheaded / armored — Natural shoreline means the system stays alive.
    • !Adequate frontage — 150 ft is workable but you'll re-walk the same ground often.
    • ✓Price inside zone historical band — Asking sits inside the GA historical band ($60k–$350k).
    • !Collecting law has nuance — read carefully — Surface collecting on private land in this state is unrestricted by permit.
    Bring this to the showing
    • Verify on site: adequate frontage.
    • Verify on site: collecting law has nuance — read carefully.
    World-class assessor (parcel-pinned)

    This scorecard runs on inputs you typed. For citation-grade truth — Macrostrat surface geology at the centroid, FEMA flood zone, USFWS CBRS status, Paleobiology DB occurrences, iNaturalist sanity check, and hard-gate logic above the score — generate the full dossier against a real address.

    Add an address above to enable the dossier.

    Sources