1. 1990
2. Studies on micro algal fine-structure, taxonomy and systematics : cryptophyceae and bacillariophyceae.

   Awdur: Novarino, G., Rhag 1990

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

3. 1991
4. Shear dispersion in the surface layers of the sea.

   Awdur: Shield, S. R., Ion 1991

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

5. Behavioural responses of the shore crab Carcinus maenus to salinity variation.

   Awdur: Mcgaw, I. J., Chwef 1991

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

6. Aspects of the biology of Sacculina carcini (Crustacea: cirripeda: rhizocephala), with particular emphasis on the larval energy budget.

   Awdur: Collis, S. A., Medi 1991

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

7. Late Quaternary benthonic Foraminiferal stratigraphy the western U.K. Continental Shelf.

   Awdur: Austin, W. E. N., Medi 1991

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

8. Postglacial vegetational dynamics in Lowland North Wales.

   Awdur: Watkins, R., Rhag 1991

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

9. Trace elements and polychlorinated biphenyl (PCB) congeners in Liverpool Bay sediments.

   Awdur: Camacho-Ibar, V. F., Rhag 1991

   Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

10. 1992
11. Geophysical/sedimentological studies of a Quaternary tidal delta system

    Awdur: Solangi, S. H., Ion 1992

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

12. Sedimentological, geophysical and oceanographic studies of postglacial and contemporary sedimentary processes of the NE Menai Strait and Conwy Bay (Wales, U.K.)

    Awdur: Ali, A., Ion 1992

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth

13. Stratigraphy and palaeobotany of Middle Pleistocene interglacial deposits in the North Sea.

    Awdur: Ansari, M. H., Ion 1992

    Traethawd ymchwil myfyriwr: Doethur mewn Athroniaeth