Earth’s Ongoing Transformation
The Ocean Floors And The Condition That The Tectonic Plates Surround Are Not Static. They Move In A Fascinating Cycle That Has Dramatically Changed The Face Of The Earth Over Millennia. It Is A Good Reminder Of An Idea So Important To Mindfulness: Impermanence That Is That Everything Is Changing, In Our Minds, Our Bodies, And The World Around Us. The Earth Is A Planet Made Up Of Four Layers. The Inner Two Are So Deep Within The Earth That They Have Never Been Seen. The Third Is The Mantle, A Mixture Of Silicates And Other Minerals, Upon Which The Fourth Layer Floats: The Solid Earth's Crust. But The Picture Is A Little More Complicated Than A Simple Four-Layered Onion Skin. The Outer Two Layers Have Been Interacting In A Delicate Cycle For Billions Of Years, Molten Parts Of The Mantle Solidifying Into A New Crust, As Older Crust Melts Back Into Mantle. The Density And Thickness Of The Earth's Crust Varies, With The Ocean Crust Being The Heaviest, But Also The Thinnest, 5-10 Kil...