The clay minerals of sedimentary rocks are a good example. Clays are surface minerals, which form as feldspar and mica break down in the conditions at the Earth's surface. With heat and pressure they slowly return to mica and feldspar.Fluids are an important agent of metamorphism.Every rock contains some water, but sedimentary rocks hold the most. First there is the water that was trapped in the sediment as it became rock. Second is the water that is liberated by clay minerals as they change back to feldspar and mica.he foliated rock types that form under these conditions are called schist or gneiss, depending on their texture. Schist is finely foliated whereas gneiss is organized in wide bands of minerals. Contact or Local Metamorphism A type of metamorphism that is important in specific localities is contact metamorphism.
Although miniature sunflower varieties are about 2 feet tall, and giant varieties can grow over 10 feet tall, standard sunflowers are usually between 6 to 10 feet in height.Depending on the variety, sunflower plants started from seed can mature in 70 to 100 days.unflower Growth. After the seeds sprout, the plants will need space to grow. Thin giant varieties 4 feet apart, miniature varieties 1 foot apart, and standard varieties 3 feet apart. About 33 days after germination, the flower heads will appear.
Check the outdoor temperatures. While sunflowers can be started indoors, they work best if they're moved outdoors within a week. They grow best at temperatures between 64 and 91ÂºF (18â33ÂºC), but you can give it at lower temperatures, once the last frost has passed.unflowers are annual plants that produce large or small yellow flowers in the summer. Sunflowers are very popular because of their beauty, and because they are easy to grow. Planting sunflower seeds in the spring can be a fun activity for adults and children.