Jirohnagi
Braava Braava
So as the title says i think Termina is situated in a volcanic region or possibly in a ring of volcanos, the reasons i think this is the case lies in Great Bay, Snowhead and Woodfall.
Woodfall, we know that Woodfall Temple is in and of itself situated in a drowned crater atop a mountain or more accurately a drowned caldera, the temples whole purpose appears to be purifying the waters of woodfall to stop poison killing the area, this could be sulfur or other gases leaking into the water from underneath in addition to this woodfall is a heavily fertile land and volcanos are probably the best at this due to volcanic ash which could in combination with heavy downfalls cause very fertile mud and what is a swamp mostly? Mud.
The way the Temple itself purifies the water reminds me of how plants will draw in water and store it within roots and it can be released via pressure oftentimes this water will be purer than what entered the plant, we see atop the temple two dead and rotten trees, these i think were used in conjuction with the flower shrine within to draw the poison out of the waters and into the temple itself.
Snowhead, we know this region seems to struggle with winter and spring in game and i suspect this is rather due to the fact Snowhead temple itself sits atop a volcano, volcanic ash can blot out sunlight and cause freezing conditions easily, the temple itself seems to be a method of capping the volcano and the large pillar that is central to the temple could infact be a massive capstone used by gorons to seal the volcanic flow and direct it to heat the waters near by.
This could be true but i have to also take Goht into consideration this creature seems to have the power to halt the flow of seasons the boss itself seems to be made of machinary and so it's entirely possible Goht is an atmospheric dampener used in ancient times to manually change seasons, the very fact that Goht was frozen in place makes me think that as goht ran his course it spun the pillar capstone up and down allowing the heat of the below volcano to bubble up or simmer down, but thanks to skull kids meddling he was pinned in place while the capstones down causing it's circuits to ahah freeze up.
Greatbay, a watery region with a massive crevasse filled with deadly eels and waters that seem murky and overly warm, Pinnacle rock more than anything makes me think that there is underwater volcanos further off the coast or pyroclastic vents close to the beach the area of pinnacle rock is filled with massive holes similar to pumice (which is formed in volcanic flows) and these are filled with massive eels with rocklike shells for skulls, the eels themselves seem to feed much like certain whales do, straining smaller fish and organisms through their mouths for sustainence.
The waters being murky and overly warm would likely be a sign of underwater thermal vents (or pyroclastic vents if you like that phrasing more) and a rapid increase in seismic activity would cause the waters around these vents to rapidly change from gentle heat to increased heat which would kill off most form of aquatic life, similar to the zoras not being able to survive very well.
Great Bay Temple looks like a giant mechanical fish surrounded in "dragon cloud" which seems like it was water being sprayed into the air at high volume. The temple is apparently stricken by a curse that makes the waters murky and too warm for things to live there, to progress you have to basically reactivate the central turbine and restore the flow of water through the temple to access the large tank that gyorg is in which in itself has a large platform shaped like a bulkhead, i think that the temples whole purpose is circulate the water through the temple which seems to cool it down and to filter out any sediment that's risen from the ocean depths, all the water is directed into the boss room where a valve will release it back into the sea (the octagonal pillar), by circulating the water in the bay it'd stop such rapid heat fluctuations and filtering the water for any particulates would stop what happened in woodfall happening in great bay.
Ikana is one region i'm not so sure bears volcanic activity it more bears signs of tectonic activity and the hands of humanity, the reason behind it being earthquake country, the terrain leading up to ikana village is in drops indicating that the land has literally fallen away as the valley was pushed up, the Villages source of water appears to be an ore node probably iron, which could indicate why ikana was attacked if it was rich in iron ore, Stone tower Temple appears to have been physically carved from mountains and houses in itself a core leading to either hell or heaven, i think the source of volcanic activity in fact started in Ikana thanks to the tower being inverted during creation to trick the people, doing so would've ripped open the earth and caused all the seismic activity that plagues the rest of the land, the people themselves were likely slain during this tumultuous event, and even after the tower settled down these people returned as undead beings forever warring with their neighbours.
Woodfall, we know that Woodfall Temple is in and of itself situated in a drowned crater atop a mountain or more accurately a drowned caldera, the temples whole purpose appears to be purifying the waters of woodfall to stop poison killing the area, this could be sulfur or other gases leaking into the water from underneath in addition to this woodfall is a heavily fertile land and volcanos are probably the best at this due to volcanic ash which could in combination with heavy downfalls cause very fertile mud and what is a swamp mostly? Mud.
The way the Temple itself purifies the water reminds me of how plants will draw in water and store it within roots and it can be released via pressure oftentimes this water will be purer than what entered the plant, we see atop the temple two dead and rotten trees, these i think were used in conjuction with the flower shrine within to draw the poison out of the waters and into the temple itself.
Snowhead, we know this region seems to struggle with winter and spring in game and i suspect this is rather due to the fact Snowhead temple itself sits atop a volcano, volcanic ash can blot out sunlight and cause freezing conditions easily, the temple itself seems to be a method of capping the volcano and the large pillar that is central to the temple could infact be a massive capstone used by gorons to seal the volcanic flow and direct it to heat the waters near by.
This could be true but i have to also take Goht into consideration this creature seems to have the power to halt the flow of seasons the boss itself seems to be made of machinary and so it's entirely possible Goht is an atmospheric dampener used in ancient times to manually change seasons, the very fact that Goht was frozen in place makes me think that as goht ran his course it spun the pillar capstone up and down allowing the heat of the below volcano to bubble up or simmer down, but thanks to skull kids meddling he was pinned in place while the capstones down causing it's circuits to ahah freeze up.
Greatbay, a watery region with a massive crevasse filled with deadly eels and waters that seem murky and overly warm, Pinnacle rock more than anything makes me think that there is underwater volcanos further off the coast or pyroclastic vents close to the beach the area of pinnacle rock is filled with massive holes similar to pumice (which is formed in volcanic flows) and these are filled with massive eels with rocklike shells for skulls, the eels themselves seem to feed much like certain whales do, straining smaller fish and organisms through their mouths for sustainence.
The waters being murky and overly warm would likely be a sign of underwater thermal vents (or pyroclastic vents if you like that phrasing more) and a rapid increase in seismic activity would cause the waters around these vents to rapidly change from gentle heat to increased heat which would kill off most form of aquatic life, similar to the zoras not being able to survive very well.
Great Bay Temple looks like a giant mechanical fish surrounded in "dragon cloud" which seems like it was water being sprayed into the air at high volume. The temple is apparently stricken by a curse that makes the waters murky and too warm for things to live there, to progress you have to basically reactivate the central turbine and restore the flow of water through the temple to access the large tank that gyorg is in which in itself has a large platform shaped like a bulkhead, i think that the temples whole purpose is circulate the water through the temple which seems to cool it down and to filter out any sediment that's risen from the ocean depths, all the water is directed into the boss room where a valve will release it back into the sea (the octagonal pillar), by circulating the water in the bay it'd stop such rapid heat fluctuations and filtering the water for any particulates would stop what happened in woodfall happening in great bay.
Ikana is one region i'm not so sure bears volcanic activity it more bears signs of tectonic activity and the hands of humanity, the reason behind it being earthquake country, the terrain leading up to ikana village is in drops indicating that the land has literally fallen away as the valley was pushed up, the Villages source of water appears to be an ore node probably iron, which could indicate why ikana was attacked if it was rich in iron ore, Stone tower Temple appears to have been physically carved from mountains and houses in itself a core leading to either hell or heaven, i think the source of volcanic activity in fact started in Ikana thanks to the tower being inverted during creation to trick the people, doing so would've ripped open the earth and caused all the seismic activity that plagues the rest of the land, the people themselves were likely slain during this tumultuous event, and even after the tower settled down these people returned as undead beings forever warring with their neighbours.