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| | Belemnite Marl |
 | | The Belemnite Marls (averaging 23m), are a series of bluish-gray marls that are a lot paler than the Black Ven Marls that they rest upon. |
 | | At the top of this division is the Belemnite Stone (Bed 121), which is a 0.15m thick laterally persisting limestone, that forms a reef at St. Gabriels Water, that is revealed at low tide. |
 | | The regularity of the couplets in segments of the sequence, combined with a regular amplitude modulation, indicates an origin that is related to the orbital-precession cycle (i.e., one of the Milankovitch parameters). |
| www.g6csy.net /fossil/bm.html (656 words) |
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