`find_units`

Pack: macrostrat · Endpoint: https://gateway.pipeworx.io/macrostrat/mcp

Find geologic rock units from Macrostrat by location + age, by stratigraphic name, or by lithology.

Parameters

Name	Type	Required	Description
`lat`	number	no	Latitude (decimal degrees). Must be paired with lng.
`lng`	number	no	Longitude (decimal degrees). Must be paired with lat.
`age`	number	no	Geologic age in millions of years (Ma). Optional; used with lat+lng.
`strat_name`	string	no	Stratigraphic name to match, e.g. “Hell Creek”.
`lith`	string	no	Lithology to match, e.g. “granite”, “sandstone”.
`limit`	number	no	Max units to return (default 20).

Example call

Arguments

{
  "lat": 40.8071,
  "lng": -104.9901
}

curl

curl -X POST https://gateway.pipeworx.io/macrostrat/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"find_units","arguments":{"lat":40.8071,"lng":-104.9901}}}'

TypeScript (@pipeworx/sdk)

import { Pipeworx } from '@pipeworx/sdk';
const pipeworx = new Pipeworx();

const result = await pipeworx.call('find_units', {
  "lat": 40.8071,
  "lng": -104.9901
});

More examples

{
  "lat": 40.8071,
  "lng": -104.9901,
  "age": 66
}

{
  "strat_name": "Hell Creek"
}

{
  "lith": "granite",
  "limit": 10
}

Connect

Add this to your MCP client config, or use one-click install buttons:

{
  "mcpServers": {
    "macrostrat": {
      "url": "https://gateway.pipeworx.io/macrostrat/mcp"
    }
  }
}

See Getting Started for client-specific install steps.

find_units