TRANSACTIONS

OF THE

HULL

GEOLOGICAL

SOCIETY

REPORT OF BOULDER COMMITTEE.

 

BOULDERS NOTED ON THE HOLDERNESS COAST BETWEEN WITHERNSEA AND HORNSEA, 1895.

erratics on Holderness coast

 

Note 1 The above is a rough classification of 2070 boulders (above a foot in diameter), noted on the Holderness coast between Withernsea and Hornsea, a distance of 14 miles, during the summer of 1895

Note 2 All the boulders tabulated in sections A, B, C, D, E, G, H, in above table, were in situ in the clay, or were close to the boulder clay cliff from whence they were recently fallen. In section F, however, a large group of boulders occurred at about 'half-tide,' and these are included in the Table.

Note 3. Table I. gives the actual number of boulders noted in the different sections of coast. Table II. gives the percentage of the different classes of the rocks.

Note 4. The largest boulder seen was a block of Carboniferous Limestone on the beach near Mappleton, 85in × 31 in x 30 in and many others approaching this size.

A block of garnetiferous schist was noted at base of cliff near Cowden, 22 in. x 30 in x 13 in.

 

erratics on Holderness coast

REPORT OF BOULDER COMMITTEE.

 

Reported by Mr. T. SHEPPARD, HULL

 

BURSTWICK. Six miles north-east of Hull. A gravel-pit, underlying boulder clay, yielded the following varieties of boulders seldom exceeding a foot in diameter, and more or less water-worn :- Chalk and flint (Belemnites), Lias limestone and Marlstone (A. communis, Gryphcea), Old rhyolites, Carb. Limestone, Brockram, Quartz felsite (Armboth), Whin Sill, Rhomb porphyry, Red granite (Norwegian ?) Gneiss, Volcanic lava.

 

NOTE.---In the village of Burstwick are numerous boulders forming curbs, door-steps, etc. Several of these exceed a foot in diameter, and they are all well rounded. No doubt the greater part of them are from the gravel-pit. Among them are the following :- Basalt, very common, especially at the street corners; Carboniferous Limestone with fossils, numerous; granites both pink and white varieties, frequently used as doorsteps; Gneiss, one very large boulder a few yards from the village 'pub.' ; Quartzite, several on roadside leading to the church; Old rhyolite, occasionally met with as curbs on roadside. A boulder of undoubted Norwegian origin--augite-syenite--was found in a field near Burstwick, at a recent excursion of the Hull Geological Society.

 

Reported by Mr. J. W. STATHER, F.G.S., Hon. Sec. Hull Geol Soc.

MELTON. About six miles west of Hull and south of the village of Melton, the bank of the Humber is formed for about a quarter of a mile by a low cliff of boulder clay locally known as Redcliff. The clay is full of boulders, including a large percentage of far-travelled rocks. In my collection from this locality, Mr. Alfred Harker has recognised two Norwegian types, viz. the Augite-syenite (Larvikite of Br6gger), and Rhomb porphyry, neither of which have been observed so far west before. Along with these we find Brockram from the Vale of Eden, as well as other rocks waiting identification.

 

BESSINGBY. In July last I obtained the Rhomb porphyry from a clay-pit at the top of Bessingby Road, about a mile and a half south of Bridlington Quay.

 

Retorted by Mr. J. F. ROBINSON.

SWINE. A small boulder of Rhomb porphyry embedded five feet deep in boulder clay.

 

Reported by Mr. F. F. WALTON, F.G.S.

HESSLE. Small boulder of Rhomb porphyry from boulder clay overlying the gravel at Southfield.

 

[Note -This article has been scanned in from original printed format and then put through an OCR program by Mike Horne. The process may have introduced some new spelling errors to the texts. Some original misspellings have been corrected.]

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