// cpt-city: bgs/buried-valley (cpt)
//
// British Geological Survey, schemes from the GeoIndex site
//
// author: British Geological Survey
// copyright: Crown Copyright, UK Open Government Licence for Public Sector Information v3.0
// year: 2026
// url: https://phillips.shef.ac.uk/pub/cpt-city/bgs
#declare buried_valley =
color_map {
  [0.00000 color rgbf <0.1569,0.5725,0.7804,0.0000>]
  [0.33333 color rgbf <0.1569,0.5725,0.7804,0.0000>]
  [0.33333 color rgbf <0.7490,0.8314,0.5412,0.0000>]
  [0.66667 color rgbf <0.7490,0.8314,0.5412,0.0000>]
  [0.66667 color rgbf <0.9882,0.7020,0.2667,0.0000>]
  [1.00000 color rgbf <0.9882,0.7020,0.2667,0.0000>]
}