Carbonate Flange (image) Schmidt Ocean Institute Share Print E-Mail Caption This is a carbonate flange on the side of the Z mount, fluid is coming out underneath the flange and is ponded underneath it. The fluid is at 290 C and it's in contact over a few mm with 2C seawater. That sharp interface between two fluids that have different refractive indexes, or changes of speed of light which makes them a reflective mirror like surface. You can see the image of Subastian reflected. Credit Schmidt Ocean Institute Usage Restrictions Credit to Schmidt Ocean Institute. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.