Starter On white boards write down the geological time periods in the correct order (Use the mnemonics rhyme to help you) How to remember GEOLOGICAL TIME

Pregnant Pre-Cambrian Camels Cambrian Often Ordovician Sit Silurian Down Devonian Carefully Carboniferous Perhaps Permian Their Triassic Joints Jurassic Creak Cretaceous Treat Tertiary Quickly Quaternary Remember ‘continental drift’? • In Year 7 we have looked at what the world looked liked millions of years ago. • The tectonic plates were in different locations • CONTINENTAL DRIFT Remember ‘continental drift’? • This was position of the tectonic plates during the Carboniferous Period 360 million years ago. Remember ‘continental drift’? • We then saw how the tectonic plates had ‘drifted’ into new positions during the PERMIAN PERIOD (286 – 245 million years ago). • There was one ‘super-continent’ called PANGEA Continental Drift

Carboniferous Period Permian Period Continental Drift so far...

Carboniferous Period Permian Period

Triassic Period Triassic Period

• During the Triassic Period Pangaea started to break up and drift apart. JURASSIC PERIOD By the Jurassic Period Pangaea had separated and the tectonic plates were moving into new positions Cretaceous Period

• By the end of the Cretaceous Period the world was starting to look more recognisable. • However the UK was still much further south than it is today The world was slowly becoming more recognisable....

Triassic Period Jurassic Period

Cretaceous Period Remember: Title of each box Labels Capital letters Extension.

Using the Internet NOT PowerPoint.

1. 3 boxes, what did the continents look like during the Triassic/Jurassic and Cretaceous period? 2. What/how much made the continents move? 3. Sketch and label each box, place a title and find out the EXACT dates of each period. Triassic ? Until? (?? Millions of years) 4. Identify what ‘creatures’ were present on planet earth at that time. This term we are going to focus mainly on the TRIASSIC, JURASSIC and CRETACEOUS PERIODS 208 – 66 million years ago

During this is the time the rocks along the JURASSIC COASTLINE were forming JURASSIC PERIOD

• The Jurassic was a golden age for the large herbivorous dinosaurs known as the ‘sauropods’—Diplodocus, Brachiosaurus Jurassic Period

• Allosaurus was a formidable predator Tyrannosaurus Rex lived on Earth about 65 to 70 million years ago, during the Cretaceous Period. It did NOT live during the Jurassic period! The Jurassic Period is of special interest to us in the SW because we live near the ‘’

The Jurassic Coast is a World Heritage Site. It stretches from near to near , a distance of 96 miles. The Jurassic Coast

• The rocks of the World Heritage Site are laid out from oldest to youngest moving west to east, enabling us to see along ‘geological time’ • We can see the rocks formed during the Triassic, Jurassic and Cretaceous periods all along this bit of coastline because; • ‘Up-lift’ forcing the rocks to tilt • Erosion has exposed the rocks at the coast 250 – 100 million years ago sedimentary rocks were laid down during the Triassic, Jurassic and Cretaceous Periods 100 million years ago – Massive earth movements tilt all the layers of rock gently to the east lifting up rocks in the west and exposing them to erosion. years The exposed rocks are eroded away revealing Triassic and Jurassic rocks that have been buried for millions of years. 100 million – 65 million years ago – The sea floods across this 'erosion surface' and new rocks form on top recording the rest of the Cretaceous period (this is the Upper Greensand and Chalk). 65 million years – 10,000 years ago – erosion and sea level change erode the rocks further slowly creating the coast we see today. The cliffs cut through the tilted layers of rock allowing us to follow them in sequence. Extension

1. Define erosion (diagram labelled or paragraph 2. Define ‘Up-lift’

2. How does erosion change the shape of the coastline (think hard/soft-rock etc)?

3. Find out how many ice ages since the Triassic period/name of them? Ice age = sea level fall Warmer periods = ice melting and seal level ??????? (Milankovitch’s theory) http://jurassiccoast.org/rocks-and- fossils/the-formation-of-a- geological-spectacle Formation of the Jurassic coast https://www.youtube.com/watch?v=3 eMUdqSu2Kc The Jurassic Coast A World Heritage Site! Oldest rocks in the east

• East has the oldest rocks which were formed during the Triassic Period • Exmouth • Beer, • Seaton, • Axmouth Triassic Rocks found at Seaton Rocks become younger as you move East towards • The rocks in West were formed during the Jurassic Period; • Lyme Regis • • West Bay • Eroding Jurassic cliffs at Lyme Regis Erosion has exposed these ammonite beds showing thousands of fossilised ammonites from the Jurassic period West Bay Cliffs were formed during the Jurassic Period Youngest rocks in the east

• The youngest rocks are in East Dorset. These were formed during the Cretaceous Period; • Weymouth • Lulworth • Swanage Chalk cliffs at Old Harry Rocks near Swanage formed during the end of the Cretaceous Period 65 million years ago The crumpled / folded rocks at near were formed during the Cretaceous Period Tuesday 27th June Jurassic Coast

WALT: Understand how the Coast was made and then eroded

1. D,T,W 2. Read slides 1-36 3. Slide 11 – make a copy of the 3 boxes (use page underneath D,T,W) and explain what is happening. 4. Use key words and frame to help you give one paragraph of explanation.

During the ??? Period the continents were?????? Triassic period Jurassic period Cretaceous period Continents, drifting, tectonic forces, millions of years, cm’s per year Layers of Rock

1. Slides 20-24, there are 5 slides. 2. Sheet of A3 maybe 5 equal boxes,(10cm x 8cm?). 3. Use a selection of coloured paper, copy the diagrams and explain what has happened. Harbour • Just beyond Old Harry Rocks is Poole Harbour – the largest natural harbour in Britain!

Poole Harbour

Old Harry Rocks

The Jurassic Coast Poole Harbour • Poole Harbour was formed at the end of the last ICE AGE when what was a valley was filled / flooded by rising sea levels

• Although most of this topic will focus on the JURASSIC COAST, we are going to begin our journey at POOLE HARBOUR to link together many of the topics we have covered at MBS The Jurassic Coast

Poole Harbour = formed / flooded during the last Ice Age

Younger rocks Oldest rocks found Jurassic Rocks found at Old between Exmouth found at Lyme Harry Rocks and Seaton Regis and West = Cretaceous = Triassic Bay 4 FIGURE GRID REFERENCES Do you remember how to do 4 figure grid reference for each of these pictures? ☺ ♣ ☼ ∆ ♪ ۩ ♥ ♫ ∆

In silence write the 4 fig GR for each shape on the white board eg Sun = 0362 OS map work to trace the journey along the ‘Jurassic Coast’ OS map work to trace the journey along the ‘Jurassic Coast’ MEASURING DISTANCES • Get a strip of paper. • Place it on the paper so that the edge touches both features • Make a small mark on the paper where it touches each feature (middle) • Now put the paper on the SCALE LINE (starting at 0km) • Measure how far it is between the Church and the Bus Station • = 2.2KM

0 1 2 3 4 SCALE LINE (KM) Using the SCALE LINE

ALWAYS START YOUR Use these ‘dashes’ MEASUREMENT FROM ‘0’ Zero! to help you work Use the TOP out the decimal SCALE LINE to point measure in KM OS map work to trace the journey along the ‘Jurassic Coast’ Place name When the rocks were formed Distance (KM)

Direct distance from Burton Beach (edge of map) to the entrance of Jurassic Period West Bay harbor (462 903) 3.2 KM

Direct distance from entrance of West Bay harbor to Mouth Jurassic Period (448 910) 1.6 KM Youngest rocks

Actual distance along the coastline from to Jurassic Period 3.1 KM

Direct distance from Seatown to Charmouth Jurassic Period 5.7 KM

Actual distance around the coastline from Charmouth to the the Cobb in Jurassic Period Lyme Regis 3.3 KM

Direct distance from the end of the Cobb in Lyme Regis to Seven Rock Triassic Period Point 1.4 KM

Actual distance from Seven Rock Point to Culverhole Point Triassic Period (275 892) 5.8 KM

Direct distance from Culverhole Point to River Ledge (Mouth of Triassic Period the ) 2.0 KM

Actual distance around the coastline from River Ledge to East Ebb Triassic Period (Beer) 2.7 KM Oldest rocks Direct distance from East Ebb to Beer Head Triassic Period 1.5 KM Extension

• Now find some appropriate 4 fig GR of your own • Remember to look for geographical features such as cliffs, bays and headlands • You could also identify some settlements along the ‘Jurassic Coast’ • Work out what GEOLOGICAL TIME PERIOD they were formed in