Skip to Content


Helical Ridges

A cache by Loony Londo, adopted by Debs54 Send Message to Owner Message this owner
Hidden : 5/2/2010
3 out of 5
1 out of 5

Size: Size: other (other)

Join now to view geocache location details. It's free!


How Geocaching Works

Related Web Page

Please note Use of services is subject to the terms and conditions in our disclaimer.

Geocache Description:

At the cache site there is a large slab of rock with a red box on top of it. You will need to look at it closely. The stone is from the Tithonian period which is the latest age of the Late Jurassic epoch or the uppermost stage of the Upper Jurassic series. It has fossils in it!

** **This cache is located within an area frequently patrolled by Police. Please avoid acting suspiciously whilst searching for it, and if challenged, explain about geocaching.** **


Approximately 145 million years ago the land mass which forms the United Kingdom was located much further south. The area was at the bottom of a shallow warm sea filled with living creatures .As the sea water heated up in the sunshine, it released a gas. The gas reacted with positive ions in the water to form a salt.

The salt precipitated out of the and fell to the bottom of the sea Over millions of years the precipitate continued to fell to the sea floor in layers and formed a rock. This is how sedimentary rocks form. This type of rock is called limestone.

As time past different conditions and objects felling to the sea floor resulted in differences between the layers of rock laid down. The creatures living in the sea died and their remains fell to the sea floor and the rock formed around them In the rock you are looking at after a while the remains of the creatures dissolved leaving holes in the rock. If you look at the rock you will see hollows whose shape is an impressions of the creatures. The voids are a type of fossil.

After many years the rocks moved north due to continental drift and were up lifted to form an island just off the South Coast of England Several layers of the rock from this area makes a good building stone and were used all over London.

To log the cache you will have to answer four questions:-

1) Name the type of stone

2) Give me the name given by stone masons to the fossil found in this rock

3)Give me one of the Latin or scientific names of the fossil, there are two.

4) Describe the fossils .

To claim this earthcache as a find please post a photo of the location (preferably you with your GPS - with your hand pointing to one of these fossils- or just your GPS at the location) and send me an email with the answers, your caching name (eg Loony Londo) and your email address through my profile.

As soon as you receive my confirmation, you can log this cache as a find and upload your picture. Please do not reveal the answers in your log!

Good fossil hunting!

Loony Londo earned GSA's highest level:

Additional Hints (Decrypt)

Uvag 1. Guvf glcr bs ebpx nyfb sbezf va lbhe xrggyr!

Uvag 2. lbh pna svaq fvzvyne ynaq qjryyvat perngherf va lbhe tneqra gbqnl gubhtu tneqraref qb abg yvxr gurz.Fgvyy V guvax gurl ner phgr.

Uvag 3. Gur anzr bs gur pnpur tvirf n pyhr gb gur nafjre gb dhrfgvba 2

Decryption Key


(letter above equals below, and vice versa)



1,322 Logged Visits

Found it 1,292     Didn't find it 4     Write note 24     Publish Listing 1     Owner Maintenance 1     

View Logbook | View the Image Gallery of 1,041 images

**Warning! Spoilers may be included in the descriptions or links.

Current Time:
Last Updated:
Rendered From:Unknown
Coordinates are in the WGS84 datum

Return to the Top of the Page

Reviewer notes

Use this space to describe your geocache location, container, and how it's hidden to your reviewer. If you've made changes, tell the reviewer what changes you made. The more they know, the easier it is for them to publish your geocache. This note will not be visible to the public when your geocache is published.