Would you like to eat
“Geo Gashi”?
Access to pillow lava
Pillow Lava
～ Ishiki, Nishiizu Town ～
“Ishiki‐bashi” Bus Stop
Dogashima
Cross the stone
bridge and go into
the narrow way.
Q１ What shape is the
pillow lava when
flowing into the
sea ?
Q２ How old is the
pillow lava ?
Q３ What is the name
of
the
Geoshaped snacks?
Produced by
Matsuzaki High School Science Club
Supervised by
Masahito Kadota
Kanagawa Prefectural Museum of Natural History
Izu Peninsula Geopark Promotion Council
Supported by Ishiki Pillow Lava Supporters
Geo Gashi Travelers
Alexander Jackson
MaKuYo
Answers
Questions
Go in a direction of the upper stream of the Nishina
river from Hamabashi intersection.
From the Hamabashi intersection go up the upper
stream of the Nishina river for about 4 km.
Q1. It is tube shaped. Q2 It is adout 20
million years ago. Q3. Geo Gashi
Pillow Lava Became Soft Cookie!
I am MaKuYo;
Mascot Character of
“Pillow Lava”
(Makura-jo Yogan)
～ Ishiki Pillow Lava Scenery ～
When slow moving lava flows into the sea, it is shaped like a tube. A cross section of this tube looks like
many pillows have been piled on top of each other. This type is therefore called “pillow lava.” The “pillow
lava” is made because of “Magmatic Dykes” . This is when magma forces the lava outside. The lava then
cools and becomes hard, making the tube shape. The “Ishiki Pillow Lava” is the oldest part of the Izu
Peninsula. It was created 20 million years ago. When looking closely at the cliffs you can see layers of
rocks that have piled up. This is an example of “pillow lava.” In Ishiki area there are two places like this.
Tropical ocean fossils were also found in the lava suggesting that there was an underwater volcano.
Mascot character
MaKuYo
‡How pillow lava is made?‡
It’s very
narrow!!
How
pillow lava
is made?
Oh!
The top is
I want to
go out.
①
②
weakening.
③
I became hard.
I became hard.
I escaped!
④
⑤
I became hard.
I became hard.
I escaped!
It becomes
the pillow lava
in this way.
Yeah, got it!
⑥
⑦
⑧
⑨
⑩