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.
REFERENCE SERIES. CAROL RYRIE BRINK - 1895-1981. Number 1134 January 1996. Carol Ryrie Brink wrote a comprehensive body of fiction that captured the natural setting. and personal challenges of life in Idaho. In addition to her Idaho works, she wrote an impressive. twenty-seven books for adults and children over a lifetime of eighty-five years.