OGC Web Map Tile Services (WMTS) available

The Open Geospatial Consortium provides a specification for serving geographic information through the web as georeferenced images that are tiled, divided into regularly-sized units, and cached, for quick delivery; this is called the Web Map Tile Service specification. In addition to providing a visible representation of selected geospatial data, it allows the scientific attributes of the data to be queried geographically. The services listed below conform to the WMTS specification version 1.0.0.
Services of this type are specified in the formal capabilities document generated by the software, which can be obtained using the URL https://mrdata.usgs.gov/mapcache/wmts?service=WMTS&request=GetCapabilities&version=1.0.0&
Note: These tile services will work most reliably if your client requests specify the TileMatrixSet parameter value GoogleMapsCompatible. That's because the map interfaces on MRData.usgs.gov use that value, and consequently those tiles are more consistently and completely populated.
Data source Layer parameter KML network link
Geologic maps of US states sgmc2 KML Network Link
Geologic maps of US states (geologic contacts) sgmc2contact KML Network Link
Geologic maps of US states (structural features) sgmc2structure KML Network Link
Geologic map of Alaska sim3340 KML Network Link
Geology of Puerto Rico prgeol KML Network Link
Magnetic anomaly map of North America magnetic KML Network Link
Hydrothermal alteration in the Basin and Range province of the US alteration KML Network Link