4D twin · seismic-tied
Georgetown / Hunter (cluster)
Martin Marietta · Williamson County, TX · site LTH-MARTIN-MARIETTA-TX
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230 m NAVD88 · Vp low —— high
Ore–seismic crosswalk
Each shell is tied to the survey that would image it. Desk compilation from published USGS / industry methods — not the operator’s confidential cube. Not a reserve.
| Ore shell | Survey | Method | Year | Tie | Vp m/s |
|---|---|---|---|---|---|
| Edwards limestone benches | Edwards karst line | 2D reflection | 2016 | Ties the shell | 900–4800 |
| Terrace gravel overburden | GPR void grid | GPR | 2022 | Ties the shell | 300–2200 |
| Edwards limestone benches | GPR void grid | GPR | 2022 | Ties the shell | 300–2200 |
PhD geological read
User-initiated. Grounded in MCS 2026, the mapped ore shells, and the seismic crosswalk. Not a reserve.
Cretaceous Edwards Formation. Central Texas housing and highway load.
Capacity
Workforce380
Nameplate16,000,000 tpy
Utilization90%
Effective14,400,000 tpy
t / person-year42,105
Landform is site-typed: porphyry pit, block cave, underground vein/reef, Carlin, gravel, quarry. Seismic fences are Vp-banded.