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.
Sunflowers are known for the way the blooms, or flower heads, turn to face the sun throughout the day. The sunflower head is actually composed of hundreds to thousands of individual flowers joined together. Single-stem sunflowers produce one large bloom per plant. This bloom may be followed by multiple smaller flowers. Multibranching sunflowers have multiple stems of flowers and bloom over a longer period. Sunflower stems can be pinched back before they flower to encourage bushier growth and more blooms.