/*
  cpt-city: wkp/strat/eras (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(250, 253,   1)   0.000%,
  rgb(250, 253,   1)   1.637%,
  rgb(103, 197, 202)   1.637%,
  rgb(103, 197, 202)   6.275%,
  rgb(153, 192, 141)   6.275%,
  rgb(153, 192, 141)  13.550%,
  rgb(254, 179,  67)  13.550%,
  rgb(254, 179,  67)  25.000%,
  rgb(253, 180, 105)  25.000%,
  rgb(253, 180, 105)  40.000%,
  rgb(247,  67, 115)  40.000%,
  rgb(247,  67, 115)  65.000%,
  rgb(249, 155, 197)  65.000%,
  rgb(249, 155, 197)  70.000%,
  rgb(234, 102, 177)  70.000%,
  rgb(234, 102, 177)  80.000%,
  rgb(244,  68, 159)  80.000%,
  rgb(244,  68, 159) 100.000%
);