The protolith may be a sedimentary rock, an igneous rock or another older metamorphic rock. Metamorphic rocks make up a large part of the Earth 's crust and are classified by texture and by chemical and mineral assemblage (metamorphic facies). They may be formed simply by being deep beneath the Earth's surface, subjected to high temperatures and the great pressure of the rock layers above it.
Onions and garlic belong to the allium family. The delicious foundation of may recipes, they also impart disease-fighting, health-promoting properties.. Think of your favourite savoury recipes. You would probably be hard-pressed to choose one that does not start by sauteing sautÃ©ing onions or, garlic or. both
Onion Allergy â Symptoms, Tests and Treatments. Onion is a widely cultivated vegetable which is used in a lot of recipes. It is a species of genus âAlliumâ. But there are few people who have been suffering from allergic reaction as soon as they consume onion.