<br>
==== Leaf shaped heads - Thålin Group 1===='''Thålin Group 1'''
Leaf shaped heads, Petersen types A(B), C(D1) and E, seem to go out of fashion by 950AD [PETERSEN 1919]. Other people have suggested that a few leaf shaped heads may have continued throughout the period [*Citation Needed].
==== Angular shaped heads with Short Sockets - Thålin Group 2===='''Thålin Group 2'''
Group 2 consists of Petersen types D:2, G and H. They are all types with edge shoulders placed low on the blade and a short conical socket with marked narrowing below the blade.<br>
Fuglesang includes the winged spears of Petersens type D2 in with this group as he removed wings as a determinant of typology making Petersens D2 and G types the same. See the section on ‘Winged Spears’ for examples of D2 style spear heads.<br>
It has also been suggested by Fuglesang and Petersen that type G spearheads without wings may be of eastern origin with the majority of finds coming from Sweden and Finland. A few decorated type G spears have been found with Urnes style decoration.
====Angular Spearheads with Long Sockets - Thålin Group 3===='''Thålin Group 3'''
Group 3 consists of Petersen types F, I, K & M. They are all types with a narrow blade which is often shouldered and a socket that is long, narrow and conical.<br>