...John C. W. Cope; David T. C. Sole Abstract The occurrence of ammonite jaw apparatuses in situ within concretions from the Sinemurian (Lower Jurassic) of Black Ven Cliff, Charmouth, Dorset, provides evidence of burial of the ammonites with soft parts intact and this is of importance in considering...

...Fig. 37 Composite Geomorphological map showing the progressive development of the Black Ven, Spittles, East Cliff complex toward Lyme Regis. (Source Brunsden & Chandler 1996 updated.) Note the rapid changes between 1986–2001. ...

.... References Arber , M. A. 1973 . Landslips near Lyme Regis . Proceedings of the Geologists’ Association 84 , 121 – 133 . Brunsden , D. 1969 . The moving cliffs of Black Ven . Geography Magazine 41 , 5 , 372 – 374 . Conway , B. W. 1974 . The Black Ven landslip...

.... Geol. London. 5, 205-22. CHANDLER, R. J. 1972. Periglacial mudslides in Vest- spitzbergen and their bearing on the origin of fossil HEAD DEPOSITS AND CLIFF INSTABILITY, W. DOREST 275 'solifluction' shears in low-angled clay slopes. Q. J. eng. Geol. London. 5, 223-41. CONWAY, B. W. 1974. The Black Ven...

..., and the upheaval at the toe indicated further that this was a deep rotational slip. From studies to the west of Lyme Regis (Pitts, in prepara- tion), the Lister Gardens lip probably relates to the position of Table Ledge, a lithostratigraphical horizon dividing the Blue Lias from the lowest member of the Black Ven...

.... Proc. Geol. Assoc. 44 , 131 – 167 . Conway, B. W. 1973. The Black Ven Landslip, Charmouth, Dorset. Paper presented to the Engineering Group of the Geological Society Field Meeting, May 1973, 1–5. De Freitas, M. H. & Watters, R. J. 1974 . Some field examples of toppling...

... at Folkestone, Sussex ( Trenter & Warren 1996 ), Ventnor, Isle of Wight ( Hutchinson 2001 ) and Black Ven, west Dorset ( Brunsden 2002 ) are among the largest active landslide systems in the UK. Westwards from Dorset, the Gault facies of the Albian Stage is replaced on the east Devon coast by sandstones...

... Upper Chalk ~_ Middle Chalk ~a Cenomanian Limestone Phosphatic Greensand 5b Cherty Greensand 5a Foxmould L Gault 3c Black Ven Marls 3b Shales with Beef 3a Blue Lias 2(1 White Lias 2(: Cotharn Marble 2'o Rhaetavicula contorta Shales 2a Bone bed I lL Tea Green Marls la Red Marls Horizontal Scale 1:10500...

... direction of the Ruremonde graben. In the latter it has been found by drilling at Ven, that the Upper Oligocene was encountered at a depth (970 feet) much less than at Eelen and Molenbeersel (2,400–2,900 feet); consequently, there probably exists under the Ven region a horst similar to the one of Peel...

... ammonites were illustrated, but the significance of the damage was not recognized by the original authors. Most of the Lias Group fossils discussed below are found in two preservational contexts. They occur either within eroded concretions found on the foreshore below Black Ven, east of Lyme Regis...

... TIOpidoceras U. iamesoni masseanum MARLS Upronia jamesoni rarimstatum Astemceras BLACK VEN Gsu natum ~n i - ras Agassi&s BEEF sem'wstatum scipionianum Anetites bucklad rotiforme Vermiceras conybeari I ZONES 1 SUBZONES 1 COAST DORSET I I P. anis ASTARTE BED I I RED CONGLOMERATE RED BEDS L. haugi I I I W Fig. 2...

... consists of ∼850 m of dark brown to greenish-black, fine-grained, blocky quartzite, forming imposing craggy cliffs mantled by abundant blocky talus. Magnetite-ilmenite averages ∼5 vol% of the rock. The overlying Montenegro Member is ∼300 m thick. It consists of argillaceous, gray-green, thinly bedded...

... mudstone with shell fragments LGD8 Cain’s Folly, Stonebarrow Hill, Dorset (ct) SY 3739 9288 Wessex Charmouth Mudstone Black Ven Marl Dark grey, laminated mudstone LGD9 Seatown, Dorset (ct) SY 4221 9162 Wessex Dyrham Eype Clay Medium-dark grey mudstone LGD10 Watton Cliff, Dorset (ct...

... of change (black) at 0.1 m intervals; grey contours at 0.25 m intervals given morphology of cliff face. (a) July, 2004; (b) April, 2004; (c) October, 2003; (d) October, 2004 and (e) Total change monitored between September; 2003 to December, 2004. Clear lithological control on failure ( Fig. 3 ) is apparent...

... lamellae. Two sets of discontinuous microfractures (one set black and the other set white) intersect at approximately 127° and are filled with calcite. ( b ) Clinoenstatite lamellae (parallel to the NS crosshair indicated by arrow) show inclined extinction, in contrast to the majority of the crystals...

... anticline. The Central Wessex High is bounded to the north by the Winterborne Kingston Trough, which also experienced moderate inversion. Within the Wessex Basin there are three potential source rock intervals of Jurassic age: Liassic shales (Blue Lias, Shales with Beef, Black Ven Marls), Oxford Clay...

... recovery 100 years after a seawall had been built to prevent toe erosion. Before the 1993 landslide the largest known event in South Bay had been the compound failure at the Spaw in which around 30m of cliff top slowly settled 15m. In this sense, the Holbeck Hall landslide was a black swan event...

...) and Pitts & Brunsden (1987). The Lower Lias deposits comprise the Blue Lias, interbedded limestones and mudstones, overlain by the Lower Black Ven Beds consisting of mudstones with fibrous calcite (known as ‘beef’) and occasional limestone bands. The Lower Black Ven beds weather to a high or extremely...

... . The densely spaced intrusions locally exceed the volume of the host sediments. Their geometry is exposed only in coastal cliffs but remains often indefinite because diabases, together with the country rock, are locally brecciated, cut by numerous quartz-carbonate veins, and underwent limonitization...