/*
  cpt-city: wkp/strat/periods (cpt)

  colours from the Wikigeologic scales, dates (MYa)
  from wikipedia pages

  author: Sémhur
  copyright: Creative commons attribution share-alike 3.0 unported
  year: 2010
  url: https://phillips.shef.ac.uk/pub/cpt-city/wkp/strat
*/
linear-gradient(
  0deg,
  rgb(254, 254, 228)   0.000%,
  rgb(254, 254, 228)   0.477%,
  rgb(200, 235, 255)   0.477%,
  rgb(200, 235, 255)   4.249%,
  rgb(253, 192,  82)   4.249%,
  rgb(253, 192,  82)  12.085%,
  rgb(197, 229,  71)  12.085%,
  rgb(197, 229,  71)  26.845%,
  rgb(226, 244, 224)  26.845%,
  rgb(226, 244, 224)  36.827%,
  rgb(107,   1, 125)  36.827%,
  rgb(107,   1, 125)  46.310%,
  rgb(240,  64,  40)  46.310%,
  rgb(240,  64,  40)  55.166%,
  rgb(103, 171, 160)  55.166%,
  rgb(103, 171, 160)  66.273%,
  rgb(203, 140,  55)  66.273%,
  rgb(203, 140,  55)  76.753%,
  rgb(179, 226, 208)  76.753%,
  rgb(179, 226, 208)  81.864%,
  rgb(  0, 146, 112)  81.864%,
  rgb(  0, 146, 112)  90.092%,
  rgb( 64, 133,  33)  90.092%,
  rgb( 64, 133,  33) 100.000%
);