Charles Darwin Collection The Charles Darwin Collection - a collaboration between the Open University and the Sedgwick Museum. Access the digital thin sections on the Open University's Virtual Microscope for Earth Sciences Project website. Show 10202550100 entriesSearch: Rock TypeRock Class PrimaryRock Class Rock TypeRock Class PrimaryRock Class Altered granite in contact with schistMetamorphicMagmatic Amygdaloidal monchiquiteIgneousVolcanic Andesite - James IslandIgneousMagmatic Arenite sandstone - Falkland IslandsSedimentaryClastic Carbonate cemented dunite brecciaIgneousVolcanic Carbonated palagonite tuffIgneousVolcanic Conglomeratic obsidianSedimentaryClastic Cordierite biotite slate hornfels - Wollaston IslandMetamorphicMetapelite Diorite - Magellan StraitsIgneousMagmatic Essexitic olivine basaltIgneousVolcanic Feldspathic sandstoneSedimentaryClastic Foraminifera limestoneSedimentaryCarbonate Garnet-biotite augen gneissMetamorphicMetapelite Grossular-epidote-prehnite skarnMetamorphicMarble / Calcsilicate Grossular-prehnite skarnMetamorphicMarble / Calcsilicate Hornblende porphyrite - Blue MountainsIgneousMagmatic Hornblende porphyrite - ValparaisoIgneousMagmatic Hornblende schistMetamorphicMetabasite Myrmekitic granulite/charnockiteIgneousMagmatic Nepheline basanite with iddingsiteIgneousVolcanic Showing 1 to 20 of 28 entriesPreviousNext