1915 off the Dogger Bank.
The Dogger Bank is frequented by numbers of French fishing-boats.
An interesting deposit of oolitic magnetic ore occurs in the Dogger (Inferior Oolite) of Rosedale Abbey, in Yorkshire; and a somewhat similar pisolitic ore, of Jurassic age, is known on the continent as chamoisite, having been named from Chamoison (or Chamoson) in the Valais, Switzerland.
On the south coast of the same island are coarse-grained, brownish micaceous and light-coloured calcareous sandstone and marls, containing fossils, which render it probable that they are of the same age as the coal-bearing Jurassic rocks of Brora (Scotland) and the Middle Dogger of Yorkshire.
It is caught on all parts of the British and Irish coasts, but the Dogger Bank, and Rockall, off the Outer Hebrides, have been specially noted for their codfisheries.
In the North Sea north of the Dogger Bank, for instance, the disk is visible in calm weather to a depth of from io to 16 fathoms, but in rough weather only to 62 fathoms. Knipovitch occasionally observed great transparency in the cold waters of the Murman Sea, where he could see the disk in as much as 25 fathoms, and a similar phenomenon has often been reported from Icelandic waters.
The fresher enclosed seas include the Malay and the East Asiatic fringing seas with 30 to 34.5 per mille, the Gulf of St Lawrence with 30 to 31, the North Sea with 35 north of the Dogger Bank diminishing to 32 further south, and the Baltic, which freshens rapidly from between 25 to 31 in the Skagerrak to 7 or 8 eastward of Bornholm and to practically fresh water at the heads of the Gulfs of Bothnia and Finland.
The temperature is the same from surface to bottom, and this occurs not only south of the Dogger Bank, where the condition is normal, but also, though less frequently, in the deeper water farther north.
Excitement, they opened fire on a fleet of British trawlers voyage on the Dogger Bank, and several fishermen were killed.
A desperate battle was fought on the Dogger Bank on the 5th of August between Sir Hyde Parker and the Dutch admiral Zoutman, both being engaged in protecting trade; but Holland did not affect the general course of the war.
When the Dogger Bank incident occurred, the possibility of operations of war being carried on within a few miles of British home ports, and amid the busy traffic of the North Sea, was brought vividly home to British minds.
An indecisive, but bravely fought action with Admiral Parker at the Dogger Bank showed, however, that the Dutch seamen had lost none of their old dogged courage, and did much to soothe the national sense of humiliation.
' As a result of the international North Sea fishery investigations, it has been proposed to extend the same principle for the development of the deep sea fishery in the neighbourhood of the Dogger Bank.
Experiments with labelled plaice, carried out in 1904 by the Marine Biological Association, showed that small plaice transplanted to the Dogger Bank in spring grew three times as rapidly as those on the inshore grounds, and the same result, with insignificant variations, has been obtained by similar experiments in each succeeding year.
In this case the deep water round the Dogger Bank acts as a barrier to the emigration of the small plaice from the shores.