It warned of a rapid erosion in science, technology and education that threatened American economic competitiveness.
The rapid erosion ended at both sites about 14,000 years ago, about 4,000 years after the end of the last ice age.
The gap is the result of relatively rapid erosion along a geological fault.
Sand and stones collected from the reef for use as ballast on ships contributed to the rapid erosion.
The newly erupted volcanic material is subject to rapid erosion depending on the climate conditions.
Changes 2 & 3 are needed because oil firing produces higher temperatures than coal firing and can cause rapid erosion of metal.
The combined effect is a rapid erosion in the real buying power of their money.
She said they bought their house in 1980 after a geological survey conducted by a neighbor found little risk of rapid or excessive erosion.
In particular, there has been a rapid erosion of Britain's manufacturing base.
The coast is subject to rapid marine erosion.