Gonzalo
@casiellesgeology.bsky.social
#Geochemistry Strontium in seawater through deep time 🧪⚒️
Strontium has several stable isotopes. One of them is Sr-87, which is formed by the radioactive decay of Rb-87, an isotope with a super long half-life of 4.92*10^10 years. Today seawater has the same Sr-87/Sr-86 ratio everywhere,
Strontium has several stable isotopes. One of them is Sr-87, which is formed by the radioactive decay of Rb-87, an isotope with a super long half-life of 4.92*10^10 years. Today seawater has the same Sr-87/Sr-86 ratio everywhere,
December 10, 2024 at 9:34 PM
#Geochemistry Strontium in seawater through deep time 🧪⚒️
Strontium has several stable isotopes. One of them is Sr-87, which is formed by the radioactive decay of Rb-87, an isotope with a super long half-life of 4.92*10^10 years. Today seawater has the same Sr-87/Sr-86 ratio everywhere,
Strontium has several stable isotopes. One of them is Sr-87, which is formed by the radioactive decay of Rb-87, an isotope with a super long half-life of 4.92*10^10 years. Today seawater has the same Sr-87/Sr-86 ratio everywhere,
And emeralds weren’t the only chromium-bearing gemstones that formed there, there is also #alexandrite a gem known for its ability to change colour from blueish green to red depending on ambient lighting #afranqueira #gemstonedeposits
October 28, 2024 at 7:29 PM
And emeralds weren’t the only chromium-bearing gemstones that formed there, there is also #alexandrite a gem known for its ability to change colour from blueish green to red depending on ambient lighting #afranqueira #gemstonedeposits
⚒🟢 #MineralMonday Emeralds from the Franqueira Mine, Galicia, northwestern Spain.
#Emeralds are rare, valuable minerals famously used in jewellery. They are a variety of beryl (Be3Al2(SiO3)6) with trace amounts of chromium, which give them their green colour.
#Emeralds are rare, valuable minerals famously used in jewellery. They are a variety of beryl (Be3Al2(SiO3)6) with trace amounts of chromium, which give them their green colour.
October 28, 2024 at 7:16 PM
⚒🟢 #MineralMonday Emeralds from the Franqueira Mine, Galicia, northwestern Spain.
#Emeralds are rare, valuable minerals famously used in jewellery. They are a variety of beryl (Be3Al2(SiO3)6) with trace amounts of chromium, which give them their green colour.
#Emeralds are rare, valuable minerals famously used in jewellery. They are a variety of beryl (Be3Al2(SiO3)6) with trace amounts of chromium, which give them their green colour.
Amazing paleoart of a Miocene oyster reef! Here is a photo of 2 blocks from Stetten, Austria, at the Natural History Museum of Vienna #fossils #paratethys #miocene #crassostrea
October 27, 2024 at 5:57 PM
Amazing paleoart of a Miocene oyster reef! Here is a photo of 2 blocks from Stetten, Austria, at the Natural History Museum of Vienna #fossils #paratethys #miocene #crassostrea
Let’s start with some #paleontology Eurohippus messelensis from the Natural History Museum of Vienna. This species is an early member of the horse family from the Messel Formation, Early-Middle Eocene transition of Hesse, Germany.
October 26, 2024 at 5:34 PM
Let’s start with some #paleontology Eurohippus messelensis from the Natural History Museum of Vienna. This species is an early member of the horse family from the Messel Formation, Early-Middle Eocene transition of Hesse, Germany.