The oldest taxonomic unit of the tanged point complex during the last Glacial in N/E Europe is the Brommean, which is known from a narrow zone following the young moraine area around the Baltic Ice Lake, from Denmark, northern Germany, northern Poland up to Lithuania and Belarus. Some isolated sites are also known from Central Poland. Brommean hunter-gatherers may have also been present along the southern coast of Baltic Ice Lake, which is now covered by Baltic Sea. According to multiple lines of evidence, the Brommean Culture is dated to the 2nd half of Allerød and the beginning of Dryas III period
The Brommean is characterized by a comparatively simple technology. Large cores exhibit a conical or sub-cylindrical shape and usually one striking platform only. Blades and flakes were detached by direct hard hammer percussion, as shown by presence of the distinct bulbs and thick butts of blades and flakes.
In general, the homogenous Brommean assemblages have very simple tool-kits. They consist of large tanged points, up to 12 cm long, simple end scrapers and burins. In the southern zone of Brommean territory, this ensembles are frequently associated with curved backed points (Azilian points or Federmessser) and scrapers with lateral retouches.
Brommean sites in Scandinavia are not numerous: 75 settlement sites and 240 single finds were reported by Eriksen, 1999. The number of Brommean sites in Germany, Poland and Lithuania are even smaller. Brommean assemblages in Poland are known from Rydno, a famous Late Palaeolithic ochre mining complex. Rydno Brommean assemblages are located ca 800 km from Denmark and, according to Schild (1984), this could be explained as resulting from long distance movements to search of ochre. Anyhow, this assumption cannot be proved because in N-Germany and Denmark, up to no traces of Rydno ochre usage have been found.
Bromme points are quite big compared with Ahrensburgian or Swiderian points and they are frequently seen as spear points. The general feature of tanged point evolution over the North European Plain is the decreasing size of projectiles in both the western (Brommean followed by Ahrensburgian) and eastern parts of the region (Brommean followed by Swiderian) over time. In the Preboreal period, tanged points lost their importance and were generally replaced by microliths as composite arrow head inserts(http://www.aggsbach.de/2010/11/bromme-point/).
An interesting hypothesis has recently put forward by Riede et al.: Around 12,920 years BP, the Laacher See volcano, located in present-day western Germany, erupted catastrophically. With a calculated magnitude of ~ 5.8, the Laacher See eruption was one of the largest volcanic events of the Late Pleistocene in the Northern Hemisphere. In the course of the eruption, near-vent ejecta devastated some 1,400 km2 of land and a total estimated area of more than 225,000 km2 was affected by tephra falling out of a Plinian eruption column that may have reached a height of 40 km.
It is interesting to see that the the time of the Laacher See eruption marks the important transition from northwestern Federmesser to Bromme culture in southern Scandinavia and from northeastern Federmesser to Perstunian (a Brommean equivalent) in the sub-Baltic region. These two post–Laacher See eruption entities are called “large-tanged-point technocomplexes” and are noteworthy for two reasons:
First, both are characterized by a much greater degree of regional specificity, yet their “territories” are not contiguous, despite many years of focused research in the area. Second, they are characterized by a “simplified”, typologically poor tool kit consisting of only large-tanged points, scrapers, and burins and a generally “straightforward” technology. In fact, the emergence of these technocomplexes with their characteristic large tanged points marks the loss of bow and arrow technology and a return to the exclusive use of the spear thrower.
Riede has argued that the Mega eruption of the Lacher See vulcan had multicausal consequences for the demography of the late Allerød leading to a sudden drop in demic connectedness, disruption of traditional exchange and communication networks which in turn led to a disappearance of more complex skills such as the arrow and bow technology.