WEBVTT
Kind: captions
Language: en

00:00:00.000 --> 00:00:02.210 align:start position:0%
 
this<00:00:00.420><c> video</c><00:00:00.750><c> shows</c><00:00:01.079><c> you</c><00:00:01.110><c> in</c><00:00:01.380><c> part</c><00:00:01.680><c> how</c><00:00:01.890><c> rocks</c>

00:00:02.210 --> 00:00:02.220 align:start position:0%
this video shows you in part how rocks
 

00:00:02.220 --> 00:00:04.960 align:start position:0%
this video shows you in part how rocks
are<00:00:02.429><c> prepared</c><00:00:02.820><c> for</c><00:00:03.030><c> view</c><00:00:03.270><c> under</c><00:00:03.540><c> a</c><00:00:03.570><c> microscope</c>

00:00:04.960 --> 00:00:04.970 align:start position:0%
are prepared for view under a microscope
 

00:00:04.970 --> 00:00:09.440 align:start position:0%
are prepared for view under a microscope
we'll<00:00:05.970><c> start</c><00:00:06.240><c> with</c><00:00:06.359><c> the</c><00:00:06.450><c> oil</c><00:00:06.480><c> saw</c><00:00:08.120><c> this</c><00:00:09.120><c> is</c><00:00:09.300><c> our</c>

00:00:09.440 --> 00:00:09.450 align:start position:0%
we'll start with the oil saw this is our
 

00:00:09.450 --> 00:00:11.390 align:start position:0%
we'll start with the oil saw this is our
technician<00:00:10.050><c> bill</c><00:00:10.290><c> he's</c><00:00:10.620><c> clamping</c><00:00:11.099><c> in</c><00:00:11.280><c> the</c>

00:00:11.390 --> 00:00:11.400 align:start position:0%
technician bill he's clamping in the
 

00:00:11.400 --> 00:00:13.970 align:start position:0%
technician bill he's clamping in the
rock<00:00:11.610><c> in</c><00:00:12.049><c> preparation</c><00:00:13.049><c> for</c><00:00:13.080><c> cutting</c><00:00:13.679><c> it</c><00:00:13.799><c> with</c>

00:00:13.970 --> 00:00:13.980 align:start position:0%
rock in preparation for cutting it with
 

00:00:13.980 --> 00:00:16.849 align:start position:0%
rock in preparation for cutting it with
that<00:00:14.160><c> circular</c><00:00:14.730><c> saw</c><00:00:15.000><c> blade</c><00:00:15.440><c> it's</c><00:00:16.440><c> important</c>

00:00:16.849 --> 00:00:16.859 align:start position:0%
that circular saw blade it's important
 

00:00:16.859 --> 00:00:19.310 align:start position:0%
that circular saw blade it's important
that<00:00:16.890><c> he</c><00:00:17.310><c> clamps</c><00:00:18.090><c> it</c><00:00:18.210><c> in</c><00:00:18.359><c> so</c><00:00:18.630><c> the</c><00:00:18.750><c> rock</c><00:00:18.930><c> remains</c>

00:00:19.310 --> 00:00:19.320 align:start position:0%
that he clamps it in so the rock remains
 

00:00:19.320 --> 00:00:23.330 align:start position:0%
that he clamps it in so the rock remains
steady<00:00:19.740><c> as</c><00:00:20.010><c> it's</c><00:00:20.699><c> being</c><00:00:20.910><c> cut</c><00:00:21.529><c> the</c><00:00:22.529><c> oil</c><00:00:22.560><c> saw</c><00:00:23.039><c> is</c>

00:00:23.330 --> 00:00:23.340 align:start position:0%
steady as it's being cut the oil saw is
 

00:00:23.340 --> 00:00:26.300 align:start position:0%
steady as it's being cut the oil saw is
generally<00:00:24.090><c> used</c><00:00:24.390><c> to</c><00:00:24.510><c> cut</c><00:00:24.810><c> flat</c><00:00:25.500><c> slabs</c><00:00:25.980><c> from</c>

00:00:26.300 --> 00:00:26.310 align:start position:0%
generally used to cut flat slabs from
 

00:00:26.310 --> 00:00:28.130 align:start position:0%
generally used to cut flat slabs from
bigger<00:00:26.580><c> rocks</c><00:00:26.939><c> rocks</c><00:00:27.390><c> that</c><00:00:27.599><c> are</c><00:00:27.750><c> too</c><00:00:27.900><c> big</c><00:00:28.080><c> to</c>

00:00:28.130 --> 00:00:28.140 align:start position:0%
bigger rocks rocks that are too big to
 

00:00:28.140 --> 00:00:31.730 align:start position:0%
bigger rocks rocks that are too big to
be<00:00:28.410><c> cut</c><00:00:28.619><c> on</c><00:00:28.650><c> other</c><00:00:28.949><c> saws</c><00:00:29.929><c> he</c><00:00:30.929><c> has</c><00:00:31.050><c> to</c><00:00:31.230><c> close</c><00:00:31.470><c> the</c>

00:00:31.730 --> 00:00:31.740 align:start position:0%
be cut on other saws he has to close the
 

00:00:31.740 --> 00:00:36.270 align:start position:0%
be cut on other saws he has to close the
lid<00:00:31.920><c> to</c><00:00:32.099><c> keep</c><00:00:32.130><c> the</c><00:00:32.309><c> oil</c><00:00:32.640><c> contained</c>

00:00:36.270 --> 00:00:36.280 align:start position:0%
 
 

00:00:36.280 --> 00:00:39.580 align:start position:0%
 
now<00:00:37.280><c> he's</c><00:00:37.610><c> turned</c><00:00:37.940><c> on</c><00:00:38.120><c> the</c><00:00:38.270><c> saw</c><00:00:38.480><c> blade</c><00:00:38.840><c> and</c><00:00:39.170><c> he</c>

00:00:39.580 --> 00:00:39.590 align:start position:0%
now he's turned on the saw blade and he
 

00:00:39.590 --> 00:00:41.650 align:start position:0%
now he's turned on the saw blade and he
loosened<00:00:40.040><c> the</c><00:00:40.129><c> knob</c><00:00:40.340><c> that</c><00:00:40.699><c> will</c><00:00:40.969><c> allow</c><00:00:41.329><c> that</c>

00:00:41.650 --> 00:00:41.660 align:start position:0%
loosened the knob that will allow that
 

00:00:41.660 --> 00:00:44.680 align:start position:0%
loosened the knob that will allow that
weight<00:00:41.960><c> to</c><00:00:42.620><c> pull</c><00:00:42.949><c> the</c><00:00:43.550><c> rock</c><00:00:43.790><c> toward</c><00:00:44.300><c> the</c><00:00:44.420><c> blade</c>

00:00:44.680 --> 00:00:44.690 align:start position:0%
weight to pull the rock toward the blade
 

00:00:44.690 --> 00:00:48.240 align:start position:0%
weight to pull the rock toward the blade
in<00:00:44.989><c> order</c><00:00:45.379><c> to</c><00:00:45.500><c> cut</c><00:00:45.680><c> it</c>

00:00:48.240 --> 00:00:48.250 align:start position:0%
 
 

00:00:48.250 --> 00:00:51.450 align:start position:0%
 
you<00:00:49.150><c> may</c><00:00:49.270><c> notice</c><00:00:49.630><c> the</c><00:00:49.810><c> oil</c><00:00:49.990><c> everywhere</c><00:00:50.560><c> the</c>

00:00:51.450 --> 00:00:51.460 align:start position:0%
you may notice the oil everywhere the
 

00:00:51.460 --> 00:00:53.340 align:start position:0%
you may notice the oil everywhere the
oil<00:00:51.730><c> saw</c><00:00:51.910><c> is</c><00:00:51.970><c> called</c><00:00:52.090><c> an</c><00:00:52.450><c> oil</c><00:00:52.570><c> saw</c><00:00:52.900><c> because</c><00:00:53.290><c> it</c>

00:00:53.340 --> 00:00:53.350 align:start position:0%
oil saw is called an oil saw because it
 

00:00:53.350 --> 00:00:56.549 align:start position:0%
oil saw is called an oil saw because it
uses<00:00:53.739><c> oil</c><00:00:54.040><c> as</c><00:00:54.220><c> a</c><00:00:54.250><c> lubricant</c><00:00:54.910><c> this</c><00:00:55.840><c> stops</c><00:00:56.170><c> heat</c>

00:00:56.549 --> 00:00:56.559 align:start position:0%
uses oil as a lubricant this stops heat
 

00:00:56.559 --> 00:00:59.250 align:start position:0%
uses oil as a lubricant this stops heat
caused<00:00:57.100><c> by</c><00:00:57.309><c> friction</c><00:00:57.630><c> from</c><00:00:58.630><c> shattering</c><00:00:59.140><c> the</c>

00:00:59.250 --> 00:00:59.260 align:start position:0%
caused by friction from shattering the
 

00:00:59.260 --> 00:01:05.040 align:start position:0%
caused by friction from shattering the
blade<00:00:59.530><c> or</c><00:01:00.370><c> otherwise</c><00:01:01.360><c> damaging</c><00:01:01.989><c> it</c><00:01:03.780><c> this</c><00:01:04.780><c> saw</c>

00:01:05.040 --> 00:01:05.050 align:start position:0%
blade or otherwise damaging it this saw
 

00:01:05.050 --> 00:01:06.930 align:start position:0%
blade or otherwise damaging it this saw
blade<00:01:05.080><c> does</c><00:01:05.560><c> not</c><00:01:05.770><c> have</c><00:01:06.010><c> teeth</c><00:01:06.280><c> like</c><00:01:06.580><c> a</c><00:01:06.610><c> blade</c>

00:01:06.930 --> 00:01:06.940 align:start position:0%
blade does not have teeth like a blade
 

00:01:06.940 --> 00:01:09.150 align:start position:0%
blade does not have teeth like a blade
that<00:01:07.240><c> would</c><00:01:07.360><c> be</c><00:01:07.479><c> used</c><00:01:07.690><c> to</c><00:01:07.810><c> cut</c><00:01:08.020><c> wood</c><00:01:08.290><c> but</c>

00:01:09.150 --> 00:01:09.160 align:start position:0%
that would be used to cut wood but
 

00:01:09.160 --> 00:01:11.010 align:start position:0%
that would be used to cut wood but
instead<00:01:09.550><c> uses</c><00:01:09.820><c> commercial</c><00:01:10.270><c> grade</c><00:01:10.690><c> diamonds</c>

00:01:11.010 --> 00:01:11.020 align:start position:0%
instead uses commercial grade diamonds
 

00:01:11.020 --> 00:01:15.630 align:start position:0%
instead uses commercial grade diamonds
to<00:01:11.440><c> grind</c><00:01:11.740><c> down</c><00:01:12.010><c> the</c><00:01:12.070><c> rock</c><00:01:14.130><c> so</c><00:01:15.130><c> he's</c><00:01:15.340><c> made</c><00:01:15.610><c> one</c>

00:01:15.630 --> 00:01:15.640 align:start position:0%
to grind down the rock so he's made one
 

00:01:15.640 --> 00:01:18.630 align:start position:0%
to grind down the rock so he's made one
cut<00:01:16.210><c> but</c><00:01:16.630><c> he</c><00:01:16.660><c> still</c><00:01:17.170><c> needs</c><00:01:17.530><c> a</c><00:01:17.740><c> flat</c><00:01:17.979><c> slab</c><00:01:18.340><c> so</c>

00:01:18.630 --> 00:01:18.640 align:start position:0%
cut but he still needs a flat slab so
 

00:01:18.640 --> 00:01:25.690 align:start position:0%
cut but he still needs a flat slab so
he'll<00:01:18.850><c> make</c><00:01:19.060><c> another</c><00:01:19.420><c> cut</c>

00:01:25.690 --> 00:01:25.700 align:start position:0%
 
 

00:01:25.700 --> 00:01:29.270 align:start position:0%
 
here's<00:01:26.700><c> the</c><00:01:26.939><c> finished</c><00:01:27.299><c> slab</c><00:01:27.740><c> this</c><00:01:28.740><c> part</c><00:01:29.100><c> will</c>

00:01:29.270 --> 00:01:29.280 align:start position:0%
here's the finished slab this part will
 

00:01:29.280 --> 00:01:31.880 align:start position:0%
here's the finished slab this part will
be<00:01:29.430><c> cut</c><00:01:29.640><c> down</c><00:01:29.670><c> further</c><00:01:30.299><c> the</c><00:01:31.290><c> other</c><00:01:31.439><c> parts</c><00:01:31.799><c> of</c>

00:01:31.880 --> 00:01:31.890 align:start position:0%
be cut down further the other parts of
 

00:01:31.890 --> 00:01:33.469 align:start position:0%
be cut down further the other parts of
the<00:01:32.009><c> rock</c><00:01:32.189><c> will</c><00:01:32.400><c> be</c><00:01:32.520><c> saved</c><00:01:32.820><c> for</c><00:01:33.150><c> different</c>

00:01:33.469 --> 00:01:33.479 align:start position:0%
the rock will be saved for different
 

00:01:33.479 --> 00:01:37.090 align:start position:0%
the rock will be saved for different
analyses

00:01:37.090 --> 00:01:37.100 align:start position:0%
 
 

00:01:37.100 --> 00:01:39.750 align:start position:0%
 
for<00:01:38.000><c> now</c><00:01:38.120><c> he's</c><00:01:38.450><c> going</c><00:01:38.720><c> to</c><00:01:38.810><c> wash</c><00:01:39.080><c> the</c><00:01:39.380><c> rocks</c>

00:01:39.750 --> 00:01:39.760 align:start position:0%
for now he's going to wash the rocks
 

00:01:39.760 --> 00:01:42.760 align:start position:0%
for now he's going to wash the rocks
just<00:01:40.760><c> to</c><00:01:40.880><c> minimize</c><00:01:41.060><c> mess</c><00:01:41.870><c> in</c><00:01:42.140><c> the</c><00:01:42.260><c> lab</c><00:01:42.440><c> we</c>

00:01:42.760 --> 00:01:42.770 align:start position:0%
just to minimize mess in the lab we
 

00:01:42.770 --> 00:01:44.860 align:start position:0%
just to minimize mess in the lab we
don't<00:01:42.950><c> want</c><00:01:43.130><c> oil</c><00:01:43.490><c> all</c><00:01:43.970><c> over</c><00:01:44.000><c> the</c><00:01:44.510><c> other</c>

00:01:44.860 --> 00:01:44.870 align:start position:0%
don't want oil all over the other
 

00:01:44.870 --> 00:01:47.440 align:start position:0%
don't want oil all over the other
equipment<00:01:45.560><c> or</c><00:01:45.710><c> on</c><00:01:45.830><c> the</c><00:01:45.950><c> tables</c><00:01:46.370><c> so</c><00:01:47.120><c> we</c><00:01:47.300><c> even</c>

00:01:47.440 --> 00:01:47.450 align:start position:0%
equipment or on the tables so we even
 

00:01:47.450 --> 00:01:49.150 align:start position:0%
equipment or on the tables so we even
put<00:01:47.690><c> them</c><00:01:47.810><c> in</c><00:01:47.930><c> the</c><00:01:48.020><c> dishwasher</c><00:01:48.680><c> to</c><00:01:48.830><c> get</c><00:01:48.979><c> them</c>

00:01:49.150 --> 00:01:49.160 align:start position:0%
put them in the dishwasher to get them
 

00:01:49.160 --> 00:01:53.690 align:start position:0%
put them in the dishwasher to get them
really<00:01:49.400><c> clean</c>

00:01:53.690 --> 00:01:53.700 align:start position:0%
 
 

00:01:53.700 --> 00:01:56.310 align:start position:0%
 
now<00:01:54.700><c> bill</c><00:01:54.970><c> is</c><00:01:55.000><c> looking</c><00:01:55.510><c> for</c><00:01:55.690><c> features</c><00:01:56.050><c> in</c><00:01:56.230><c> the</c>

00:01:56.310 --> 00:01:56.320 align:start position:0%
now bill is looking for features in the
 

00:01:56.320 --> 00:01:59.190 align:start position:0%
now bill is looking for features in the
rock<00:01:56.500><c> he</c><00:01:56.740><c> would</c><00:01:56.890><c> like</c><00:01:57.040><c> to</c><00:01:57.070><c> see</c><00:01:57.400><c> up</c><00:01:57.550><c> close</c><00:01:58.200><c> these</c>

00:01:59.190 --> 00:01:59.200 align:start position:0%
rock he would like to see up close these
 

00:01:59.200 --> 00:02:00.780 align:start position:0%
rock he would like to see up close these
could<00:01:59.440><c> be</c><00:01:59.560><c> mineral</c><00:01:59.950><c> alignments</c><00:02:00.520><c> or</c><00:02:00.640><c> other</c>

00:02:00.780 --> 00:02:00.790 align:start position:0%
could be mineral alignments or other
 

00:02:00.790 --> 00:02:02.340 align:start position:0%
could be mineral alignments or other
clues<00:02:01.150><c> that</c><00:02:01.420><c> can</c><00:02:01.570><c> help</c><00:02:01.750><c> us</c><00:02:01.930><c> figure</c><00:02:02.110><c> out</c><00:02:02.260><c> the</c>

00:02:02.340 --> 00:02:02.350 align:start position:0%
clues that can help us figure out the
 

00:02:02.350 --> 00:02:05.310 align:start position:0%
clues that can help us figure out the
geologic<00:02:03.040><c> history</c><00:02:03.220><c> of</c><00:02:03.580><c> this</c><00:02:03.730><c> rock</c><00:02:04.320><c> the</c>

00:02:05.310 --> 00:02:05.320 align:start position:0%
geologic history of this rock the
 

00:02:05.320 --> 00:02:07.470 align:start position:0%
geologic history of this rock the
rectangle<00:02:05.950><c> he's</c><00:02:06.250><c> tracing</c><00:02:06.550><c> around</c><00:02:06.820><c> is</c><00:02:07.180><c> what</c><00:02:07.360><c> he</c>

00:02:07.470 --> 00:02:07.480 align:start position:0%
rectangle he's tracing around is what he
 

00:02:07.480 --> 00:02:14.970 align:start position:0%
rectangle he's tracing around is what he
will<00:02:07.600><c> cut</c><00:02:07.840><c> out</c><00:02:07.990><c> on</c><00:02:08.200><c> the</c><00:02:08.320><c> water</c><00:02:08.530><c> saw</c><00:02:13.770><c> this</c><00:02:14.770><c> is</c>

00:02:14.970 --> 00:02:14.980 align:start position:0%
will cut out on the water saw this is
 

00:02:14.980 --> 00:02:18.060 align:start position:0%
will cut out on the water saw this is
the<00:02:15.010><c> water</c><00:02:15.340><c> saw</c><00:02:15.720><c> it</c><00:02:16.720><c> uses</c><00:02:17.170><c> water</c><00:02:17.380><c> to</c><00:02:17.650><c> cool</c><00:02:17.830><c> down</c>

00:02:18.060 --> 00:02:18.070 align:start position:0%
the water saw it uses water to cool down
 

00:02:18.070 --> 00:02:19.560 align:start position:0%
the water saw it uses water to cool down
the<00:02:18.100><c> blade</c><00:02:18.460><c> and</c><00:02:18.700><c> to</c><00:02:18.820><c> prevent</c><00:02:19.180><c> dust</c><00:02:19.390><c> from</c>

00:02:19.560 --> 00:02:19.570 align:start position:0%
the blade and to prevent dust from
 

00:02:19.570 --> 00:02:22.590 align:start position:0%
the blade and to prevent dust from
becoming<00:02:20.050><c> airborne</c><00:02:21.000><c> this</c><00:02:22.000><c> saw</c><00:02:22.270><c> blade</c><00:02:22.300><c> is</c>

00:02:22.590 --> 00:02:22.600 align:start position:0%
becoming airborne this saw blade is
 

00:02:22.600 --> 00:02:24.750 align:start position:0%
becoming airborne this saw blade is
another<00:02:23.110><c> diamond</c><00:02:23.650><c> blade</c><00:02:23.860><c> and</c><00:02:24.130><c> does</c><00:02:24.310><c> not</c><00:02:24.460><c> have</c>

00:02:24.750 --> 00:02:24.760 align:start position:0%
another diamond blade and does not have
 

00:02:24.760 --> 00:02:27.870 align:start position:0%
another diamond blade and does not have
teeth<00:02:25.320><c> nonetheless</c><00:02:26.320><c> bill</c><00:02:27.160><c> is</c><00:02:27.280><c> always</c><00:02:27.490><c> careful</c>

00:02:27.870 --> 00:02:27.880 align:start position:0%
teeth nonetheless bill is always careful
 

00:02:27.880 --> 00:02:36.590 align:start position:0%
teeth nonetheless bill is always careful
to<00:02:28.120><c> keep</c><00:02:28.300><c> his</c><00:02:28.510><c> fingers</c><00:02:28.930><c> out</c><00:02:29.170><c> of</c><00:02:29.320><c> its</c><00:02:29.470><c> path</c>

00:02:36.590 --> 00:02:36.600 align:start position:0%
 
 

00:02:36.600 --> 00:02:39.330 align:start position:0%
 
here's<00:02:37.600><c> the</c><00:02:37.840><c> finished</c><00:02:38.020><c> product</c><00:02:38.410><c> we</c><00:02:38.950><c> call</c><00:02:39.160><c> this</c>

00:02:39.330 --> 00:02:39.340 align:start position:0%
here's the finished product we call this
 

00:02:39.340 --> 00:02:41.700 align:start position:0%
here's the finished product we call this
a<00:02:39.400><c> billet</c><00:02:39.910><c> it</c><00:02:40.390><c> will</c><00:02:40.540><c> be</c><00:02:40.660><c> shipped</c><00:02:40.930><c> off</c><00:02:41.110><c> to</c><00:02:41.350><c> a</c><00:02:41.380><c> lab</c>

00:02:41.700 --> 00:02:41.710 align:start position:0%
a billet it will be shipped off to a lab
 

00:02:41.710 --> 00:02:44.280 align:start position:0%
a billet it will be shipped off to a lab
and<00:02:42.040><c> mounted</c><00:02:42.910><c> on</c><00:02:43.030><c> a</c><00:02:43.060><c> glass</c><00:02:43.300><c> slide</c><00:02:43.750><c> to</c><00:02:44.020><c> create</c><00:02:44.260><c> a</c>

00:02:44.280 --> 00:02:44.290 align:start position:0%
and mounted on a glass slide to create a
 

00:02:44.290 --> 00:02:46.910 align:start position:0%
and mounted on a glass slide to create a
thin<00:02:44.530><c> section</c><00:02:44.770><c> like</c><00:02:45.160><c> the</c><00:02:45.310><c> one</c><00:02:45.460><c> seen</c><00:02:46.030><c> here</c>

00:02:46.910 --> 00:02:46.920 align:start position:0%
thin section like the one seen here
 

00:02:46.920 --> 00:02:48.450 align:start position:0%
thin section like the one seen here
geologists<00:02:47.920><c> can</c><00:02:48.070><c> look</c><00:02:48.220><c> through</c><00:02:48.340><c> a</c>

00:02:48.450 --> 00:02:48.460 align:start position:0%
geologists can look through a
 

00:02:48.460 --> 00:02:50.220 align:start position:0%
geologists can look through a
petrographic<00:02:48.910><c> microscope</c><00:02:49.180><c> to</c><00:02:49.960><c> see</c><00:02:50.110><c> the</c>

00:02:50.220 --> 00:02:50.230 align:start position:0%
petrographic microscope to see the
 

00:02:50.230 --> 00:02:52.410 align:start position:0%
petrographic microscope to see the
minerals<00:02:50.590><c> that</c><00:02:50.740><c> make</c><00:02:50.950><c> up</c><00:02:51.130><c> the</c><00:02:51.280><c> rock</c><00:02:51.460><c> the</c><00:02:52.180><c> rocks</c>

00:02:52.410 --> 00:02:52.420 align:start position:0%
minerals that make up the rock the rocks
 

00:02:52.420 --> 00:02:55.140 align:start position:0%
minerals that make up the rock the rocks
composition<00:02:53.170><c> and</c><00:02:53.380><c> its</c><00:02:54.220><c> orientation</c><00:02:54.730><c> may</c>

00:02:55.140 --> 00:02:55.150 align:start position:0%
composition and its orientation may
 

00:02:55.150 --> 00:02:56.970 align:start position:0%
composition and its orientation may
provide<00:02:55.480><c> clues</c><00:02:55.540><c> about</c><00:02:56.140><c> its</c><00:02:56.290><c> formation</c><00:02:56.650><c> in</c>

00:02:56.970 --> 00:02:56.980 align:start position:0%
provide clues about its formation in
 

00:02:56.980 --> 00:02:59.430 align:start position:0%
provide clues about its formation in
history<00:02:57.430><c> here's</c><00:02:58.270><c> what</c><00:02:58.480><c> a</c><00:02:58.510><c> thin</c><00:02:58.750><c> section</c><00:02:58.990><c> looks</c>

00:02:59.430 --> 00:02:59.440 align:start position:0%
history here's what a thin section looks
 

00:02:59.440 --> 00:03:02.100 align:start position:0%
history here's what a thin section looks
like<00:02:59.650><c> under</c><00:02:59.950><c> a</c><00:02:59.980><c> microscope</c><00:03:00.810><c> here's</c><00:03:01.810><c> what</c><00:03:02.020><c> it</c>

00:03:02.100 --> 00:03:02.110 align:start position:0%
like under a microscope here's what it
 

00:03:02.110 --> 00:03:04.640 align:start position:0%
like under a microscope here's what it
looks<00:03:02.290><c> like</c><00:03:02.440><c> under</c><00:03:02.710><c> cross</c><00:03:02.980><c> polarized</c><00:03:03.610><c> light</c>

00:03:04.640 --> 00:03:04.650 align:start position:0%
looks like under cross polarized light
 

00:03:04.650 --> 00:03:08.460 align:start position:0%
looks like under cross polarized light
thank<00:03:05.650><c> you</c><00:03:05.830><c> for</c><00:03:06.010><c> watching</c>