// cpt-city: heine/GTS2004 (cpt)
//
// Geological time scale categorical color scheme
//
// Timescale: GTS2004 (Gradstein et al., 2004)
// Given are tops of STAGES in millions of years before present
//
// author: Christian Heine
// copyright: CC BY-SA 4.0
// year: 2025
// url: https://phillips.shef.ac.uk/pub/cpt-city/heine
#declare GTS2004 =
color_map {
  [0.00000 color rgbf <0.9490,0.9804,0.5490,0.0000>]
  [0.04632 color rgbf <0.9490,0.9804,0.5490,0.0000>]
  [0.04632 color rgbf <0.9020,0.9569,0.4980,0.0000>]
  [0.16349 color rgbf <0.9020,0.9569,0.4980,0.0000>]
  [0.16349 color rgbf <0.7020,0.8706,0.3255,0.0000>]
  [0.18438 color rgbf <0.7020,0.8706,0.3255,0.0000>]
  [0.18438 color rgbf <0.8000,0.9137,0.4078,0.0000>]
  [0.21617 color rgbf <0.8000,0.9137,0.4078,0.0000>]
  [0.21617 color rgbf <0.7490,0.8902,0.3647,0.0000>]
  [0.25431 color rgbf <0.7490,0.8902,0.3647,0.0000>]
  [0.25431 color rgbf <0.7020,0.8706,0.3255,0.0000>]
  [0.30972 color rgbf <0.7020,0.8706,0.3255,0.0000>]
  [0.30972 color rgbf <0.8000,0.9176,0.5922,0.0000>]
  [0.42234 color rgbf <0.8000,0.9176,0.5922,0.0000>]
  [0.42234 color rgbf <0.7490,0.8941,0.5412,0.0000>]
  [0.54042 color rgbf <0.7490,0.8941,0.5412,0.0000>]
  [0.54042 color rgbf <0.7020,0.8745,0.4980,0.0000>]
  [0.58583 color rgbf <0.7020,0.8745,0.4980,0.0000>]
  [0.58583 color rgbf <0.6510,0.8510,0.4588,0.0000>]
  [0.64396 color rgbf <0.6510,0.8510,0.4588,0.0000>]
  [0.64396 color rgbf <0.6000,0.8275,0.4157,0.0000>]
  [0.67847 color rgbf <0.6000,0.8275,0.4157,0.0000>]
  [0.67847 color rgbf <0.5490,0.8039,0.3765,0.0000>]
  [0.72661 color rgbf <0.5490,0.8039,0.3765,0.0000>]
  [0.72661 color rgbf <0.8510,0.9451,0.9686,0.0000>]
  [0.77475 color rgbf <0.8510,0.9451,0.9686,0.0000>]
  [0.77475 color rgbf <0.8000,0.9255,0.9569,0.0000>]
  [0.81925 color rgbf <0.8000,0.9255,0.9569,0.0000>]
  [0.81925 color rgbf <0.7490,0.9059,0.9451,0.0000>]
  [0.86921 color rgbf <0.7490,0.9059,0.9451,0.0000>]
  [0.86921 color rgbf <0.7490,0.9059,0.8980,0.0000>]
  [0.90100 color rgbf <0.7490,0.9059,0.8980,0.0000>]
  [0.90100 color rgbf <0.7020,0.8863,0.8902,0.0000>]
  [0.92825 color rgbf <0.7020,0.8863,0.8902,0.0000>]
  [0.92825 color rgbf <0.6510,0.8667,0.8784,0.0000>]
  [0.96367 color rgbf <0.6510,0.8667,0.8784,0.0000>]
  [0.96367 color rgbf <0.6039,0.8510,0.8667,0.0000>]
  [1.00000 color rgbf <0.6039,0.8510,0.8667,0.0000>]
}