From: https://www.researchgate.net/profile/Nathan_Korb/publication/237834924/figure/download/fig3/AS:669499963482130@1536632638728/Calcium-and-Magnesium-Cycle.png
From: https://www.researchgate.net/profile/Nathan_Korb/publication/237834924/figure/download/fig3/AS:669499963482130@1536632638728/Calcium-and-Magnesium-Cycle.png