This boundary is known as the Bullen discontinuity, or sometimes as the Lehmann discontinuity. A few years later, in 1940, it was hypothesized that this inner core was made of solid iron; its rigidity was confirmed in 1971. The outer core was determined to be liquid from observations showing that compressional waves pass through it, but elastic shear waves do not â or do so only very weakly.
Flannery Literary is a Chicago area literary agency representing writers of books for children and young adults because the most interesting, well-written, and time-honored books are written with young people in mind.
Carol Ryrie Brink. Born December 28, 1895 in Moscow, Idaho. Died August 15, 1981 in La Jolla, California. Carol Ryrie Brink wrote nearly forty plays, children's books, books for adults and collections of poetry but is principally remembered for three tales, all for children. She was born in 1895 in the small town of Moscow in the remote and only recently admitted state of Idaho.