The US Coast Guardâs largest patrol cutters are the 418 foot, 4,500 ton full load Bertholf Class National Security Cutters. The illustration that accompanies the story of the four new 5,000 ton cutters shows a ship, in many ways similar to the National Security Cutter. It appears there is a medium caliber gun on the bow.
Amphibolite is a rock composed mostly of amphibole minerals. Usually it's a hornblende schist like this as hornblende is the commonest amphibole.(more below). Amphibolite forms when basaltic rock is subjected to higher temperatures (550750Â°C) and slightly greater pressure range than that which yields greenschist.mphibolite is a rock composed mostly of amphibole minerals. Usually it's a hornblende schist like this as hornblende is the commonest amphibole. (more below).
Found in many genera of plants, calcium oxalate is a water-insoluble salt that forms bundles of needlelike crystals called raphides. Contact with moisture causes plant cells to eject the raphides, which can then come into contact with skin or mucosal surfaces. Irritancy is mechanical in part and due to the anatomically sharp structure of the crystals themselves. The crystals are believed to be more irritant when longer than 180 Âµm.