See Also: unconformity(medicine)
unconformity(dictionary)
Lyman series(dictionary)
Abbott, Lyman(encyclopedia)
Lyman (as used in expressions)(encyclopedia)
Trumbull, Lyman(encyclopedia)

Lyman series (iou) and unconformity (iou)


Lyman series (iou)



Lyman series noun phr. E20.
[Theodore Lyman (1874-1954), US physicist.]
Physics. A series of lines in the ultraviolet spectrum of atomic hydrogen, between 122 and 91 nanometres.

unconformity (iou)



unconformity noun. L16.
[from UN-1 + CONFORMITY.]
Lack of conformity (to). L16.
= NONCONFORMITY 1. M-L17.
Geology. A large break in the geological record, observable as the overlying of rocks by younger rocks which would not normally succeed them directly and which may have a different direction or plane of stratification. E19.
b. An instance of this; the surface of contact between two groups of unconformable strata. M19.