Folds are found everywhere layers are. Folds are the natural consequence of pushing a rug, cooking lasagna or deforming sedimentary or metamorphic rocks. Sniffing out folds, ‘getting a nose for them’, is part of any geologist’s training.
Here’s a Google Earth image of a chunk of northern England.
What may catch your eye is the pattern of ridges (highlighted by alternating brown peak and green grass) in the central third of the image. There is a “V” pattern that is particularly clear in the southern part. These are sedimentary layers that were originally flat. The image is about 20km across, so on this scale it is basically flat. This means that the pattern can only be explained by folding of those sedimentary layers.
The geological map shows more clearly that the ridges correspond to individual layers of rock (a single colour on the geological map) that are repeated on either side of the “V”.
This structure is called the Goyt Syncline. Away from our astronauts eye view, how does it look on the ground?
Standing here on one of the ridges (called the Roaches), it is clear the rocks aren’t flat. I hope you can see the flat surfaces sloping down to the left. These are tilted bedding planes.
Here’s a view of the whole fold. The ridge on the skyline is the one the above photo is taken from. It it dipping towards us. The ridge in the foreground is dipping away from us – we can see both sides of the fold. The “V” is lying on the ground, the tip is towards the left.
And with a bit of annotation:
The nearer ridge, called Ramshaw Rocks is very straight and must have inspired the Romans as they built one of their linear roads just below it.
Finally, here’s a view taken off the left hand side of this picture looking straight at the tip of the “V”.
The bowl like shape of the syncline fold is clearest here. The two limbs of the fold (the arms of the “V”) are very close here as we are near its tip. This is known as the nose of the fold.
They want you to come to the salon on a regular basis so they tell you that you need to
get a haircut every four to six weeks, but it’s just a way for them to make
more money. Data coverage: market sizes (historic and forecasts), company shares, brand
shares and distribution data. However, pulling on a scab that
was adherent to the skin usually dislodged the graft – often several days after pulling on a
hair was safe.
Visit my homepage :: hair growth products for women vitamins
I appreciate you spending some time and energy to put this shlrt article together.
I once again find myself personally spending a lot of time both reading and commenting
Easily, the article is actually the best topic on this registry related issue. I fit in with your conclusions and will eagerly look forward to your next updates. Just saying thanks will not just be sufficient, for the fantasti c lucidity in your writing, web design buy
This is more informative post, i can’t do that
thank you for share this
Great tips and very easy to understand. This will definitely be very useful for me when I get a chance to start my blog.
Great post.The post is very informative for me and gives us multiple ideas. Please keep us update with more such post in future. You did a great job and thanks a lot for sharing this blog. thanks for this sharing
Excellent post thank you for sharing this informative post with us.
abcya games for kids
let’s play slither.io games
Hi, I like The whole fold, The ridge on the skyline is the one the above photo is taken from. It it dipping towards us. I really appreciate for sharing about, The ridge in the foreground is dipping away from us – we can see both sides of the fold. really looking forward to read more, Keep up the good work.
Your article is very interesting. I definitely like this site. I will wait for your next post!
This article is very informative thanks for sharing.