Cleaning and the Media

Spring cleaning started early this year with Pit 91 glopping and maintenance.

Since it is a dirty job, Laura donned our recently donated fishing waders/frog suit

Michelle did some reverse basting to remove water sitting

around the fossils.

Here Karin gets those tough to reach support beams with

her vacuum hose extender handle to suck up the dirt

and leaves that Michelle bravely swept to the edge.

Michelle showcases our new Pit 91 decorations

And here's an ancient grid number I found on the wall!

Our even bigger excitement than cleaning Pit 91 in March was Media Day.

We prepared the compound and Box 1 and 14 for numerous visitors. Both

large fossil deposits from these boxeswere well exposed and shined and the

reporters were given direction on where to stand.

Along with showcasing the boxes, we also had a table of fossils in the compound

including an unprepared large tree branch, some prepared Little Timmy elements

and 6 prepared saber-toothed kitten radii.

photo by Nola Milner

In the lab a table was set up to show off Clyde's skull and mandible, juvenile bison from Box 7B, saber-toothed kitten mandibles and maxillae, elements of Fluffy, Donatello, oak leaves, beetle eaten pine, and millipede.

The fishbowl lab showed off the recently opened skull of Zed and here's the

Project 23 crew standing around him at the end of the day

John and Shelley gave a speech to numerous reporters about what has been

discovered in Project 23 for the last two years and then the reporters were

released to the table, boxes, and lab to interview us.

photo by Nola Milner

Here are some links to articles as a result:

LA Times (Blog): http://latimesblogs.latimes.com/unleashed/2011/03/la-brea-tar-pits.html

La Opinion (Print): http://www.impre.com/laopinion/noticias/la-california/2011/3/10/mamut-cuenta-la-historia-de-la-244025-1.html#commentsBlock

Trekaroo (Web): http://blog.trekaroo.com/2011/03/14/monday-madness-win-a-family-four-pack-of-tickets-for-the-page-museumla-brea-tarpits/

URCA (Radio): http://www.yourcaliforniashow.com/radio-links/prehistoricbonesnearlosangeles-homebrewing101-andmuchmore

LA Weekly (Web): http://blogs.laweekly.com/informer/2011/03/la_brea_tar_pits_new_fossils.php

KPFK (Radio): www.hearinthecity.org

Plus, close to 300 media outlets ran the AP story from when we were interviewed two days before Media Day

http://www.npr.org/templates/story/story.php?storyId=134384948

Here are the excavators looking our best on Media Day.

photo by Nola Milner

Continuing on with cleaning, last week we poked through the collection of animal skeletons that are in various states of decay in the "monkey shed." With eagerness and sometimes slight reluctance, Michelle took an inventory to show her forensic anthropology classmates who might assist in preparing them for storage in our modern comparative collection in the lab.

Karin found a shy new friend

And another....the bear labelled "Bozo"

and an apparently to Michelle, an absurd pelican beak

The fun never stops here, even with the recent torrential rain.

During lunchtime the canopy over deposit 14 collapsed from the weight of water

We also brought out the warm and cozy Tyvec suits that Bruce donated

And if you need a fossil fix (aside from looking at our great work in pictures taken by the media), here's a broken bison rib in box 14 currently exposed. At the top left there is a bison sacrum.

And check out our new scaffolding next to Box 1, complete with canopy!

We are ready for spring/summer digging!

New Staff Lounge

This was Box 7A in 2009:

Now it is these roughly 600 buckets lining the interior fence:

The floor and wall boards were cleaned up, many of them saved, and now we have a nice new staff lounge:

Here's one of the 7A board lurkers:

Now that 7A is done we are spending more time on Box 1 again. Christina and Laura

found a dire wolf baculum!

We are also working on exposing more of the large bone deposits in boxes 1 and 14 and making them pretty to show off on our upcoming media day.

In a certain area of box 14 I have been finding a few bones with a colorful oil film.

I don't recall having encountered this before in my Project 23 digging experience.

Winter Update

It has been cold. And rainy. But this has not stopped us from accomplishing a lot both outside and inside.

Current matters of the digging kind:

1. Box 7A is almost done!


and volunteer Katlynn Thompson makes excavating the rest of it look easy

2. Box 14 has been exposed down to more levels.

After removing more fill and plastic we have exposed more of the deposit edges and found more boards, metal bands, crumbling sides, buried artifacts from initial excavation (electrical wiring and a tupper-ware lid) and discovered this:


??? A hole in the west side edge of the deposit.

Recent finds of the ancient kind in 14 include:


Dire wolf sacrum found at bottom of level 3


Little Timmy's humeri. Here is the proximal end of one standing exposed. It has an old break that caliche filled. This end was removed at that break and the rest of the bone lies in level 4. We also have its other humerus lying to the west in L4.


A coyote skull, seen under the dark hard asphalt in this picture.

It's molars are in the lower center.


We continue to be captivated in curiosity by box 14 caliche. This is the top of a layer of it that we exposed in grid D-3 L4.


Here is a cross-section of caliche in the D-3 L4 south wall.


And a closer look because we love it so much.

Recent excavator activities of the non-digging kind

Last month excavators and Aisling took some time to make 2 new temporary museum exhibits featuring findings from Project 23. After putting some good use to the many cold rainy days of December, we now have an exhibit about the taphonomy of our box 1 American lion "Fluffy" and an exhibit about how box 5B was excavated and what we found. Come check them out in the Page Museum near the "fishbowl"!

Also, we have been starting to screen-wash non-asphaltic matrix buckets from box 5B to see if they are sterile. Here Michelle and Karin break apart matrix of different soil types within a grid that have been soaking in water.

We are planning on having a larger washing station made for us so we can quickly sort through

the buckets

Stay warm!

Trevor's Lab Update and words on National Fossil Day

Updates!

It has been eventful times this fall. Aside from uncovering hundreds of new fossils we've been involved in a couple other fun activities like speaking to volunteer Mary Simun's AP Environmental Studies class and having a table at NHM's Haunted Museum where we educated on the 3 sloths found at RLB



Also, there have been some major staffing changes. We celebrated Chris Shaw's retirement and are also now fully staffed (except for Collections Manager) Karin Rice and Laura are now full-time, and Christina Lutz is part-time. Congrats to all!

Now for some needed box updates!

I know that some are wondering what has been up with box 1, and that is...a bit of remodeling, pedestaling, and power digging. Box 1 currently has some of the most curious and hardest grids to excavate which has lead us to take slightly different approaches to traditional digging. We are now "pedestaling" around the main fossil deposit in the south end. This means taking the matrix around the bones down to deeper grid levels without removing the bones. This creates a side view of how they are in place which helps us see how the deposit formed. To easier accomplish that excavation approach a "window" was removed from the south wall next to the bones so that someone can stand outside the box and excavate from the side as Tara demonstrates here, working across from Michelle.



The rest of the open grids in box 1 are sterile and difficult which means its time to bring out the power tools if we want to get this box done in the next 10 years. Michelle and I have been using the pneumatic hammer and Herb brought in his electric hammer which proved very useful in clearing out half of a grid in one day. Here's Michelle digging her "hole to China" in a hard sterile grid next to the bone deposit.



And 7A?

Since 7A was re-opened on the 7th of July all of the "C" grids from level 3 to the bottom boards have been completed (roughly 4 tons of matrix) and now we are well into the B grids



The major fossil finds are 3 horse cervical vertebrae. Other bones have been sparse - just a few bones from smaller animals and random worn large bone frags. There are however gastropods galore



And some neat geology has been revealed, such as this wavy silt/clay structure that was probably created by asphalt deforming soft sediment



Volunteers have been great at chiseling though the tough old asphaltic stream beds of 7A.



Everyone still loves the safety glasses which are a necessity in 7A...but will they protect Karin from Justin's apparent backstabbing...?



With their help, including the "Master Chiseler" Jack (aka The Chiserater, Jack the Chipper, or The Grand Chizier) who competes with Herb as to who can produce the most buckets in a day, we will probably have this box finished within the next couple of months.

And there's continual awesomeness in the large box 14 deposit:

I like to call it a fossil buffet


Here's a closer look at the dire wolf skull that was "biting" our box 14 juvenile mastodon's scapula



Both of Little Timmy's scapulae and a humerus have been exposed. Plus...we found the back of a sloth skull! And recently a coracoid from a teratorn, the largest bird found at RLB - its a giant condor with a wingspan of 12 feet!

Box 14 also has this



See those bluish-gray bands that surround the brown bone? That is a caliche that has never been seen at RLB before and its formation is still somewhat of a mystery...speaking of which...did anybody catch the Page Museum featured in the Travel Channel's "Mysteries at the Museum" show that aired last week?

an overdue farewell

Hey asphaltophiles,

This is old news to some of you, and of no consequence to others, BUT:

As you may or may not have noticed, I (Andie) have not been posting to this little blog. And that's because I am no longer an excavatrix! About two months ago I packed up my 18-year-old Honda and drove to the lovely twin cities of Champaign-Urbana, Illinois. I am in grad school for library and information science, with a specialization in data curation! It's super duper fascinating, I promise.

Carrie, senior excavatrix extraordinaire (and maybe others) has and will continue to update the blog, time permitting. Seeing as she is fully awesome, the blog under her guidance has been (and will be!) fully awesome as well.

So please, wish me luck in the soon-to-be-frozen north as my Californian blood is frozen solid this winter and my brain is filled with way too much information about information. And best of luck to all the diggers, present and future, of La Brea: may your trowels find tapirs, and your discovery marks be few.

Cheers,
Andie

The Great Volunteer Bucket Moving Day

On September 21, for about 2 hours, the Page Museum was graced with 100 UCLA freshman's extra pairs of hands as part of their Volunteer Day event, in which more than 4500 freshmen are involved in city-wide community service. When we were approached by them for work we thought it to be a great opportunity to get some needed gardening, painting, and matrix bucket moving done.

Project 23 was given 30 of the volunteers and a few of their captains to help us organize our buckets by concentrating buckets from each box to one location and ordering by grid, with each specific grid bucket being counted. Since having that many people in the compound at one time is a bit terrifying they were divided into 5 groups for each deposit with each group being supervised by a staff member (Michelle, Laura, and I) or volunteer (Karin and Christina) Taking time out from supervising the new garden addition, Aisling captured our bucket moving moments.

Here Laura explains to her freshmen how exactly they will be moving buckets onto the fancy platforms that we constructed to protect bucket bottoms from rusting.



The volunteers were very enthusiastic to help move buckets for science





The driveway was utilized to pre-sort buckets for box 1 and 5b.



There were a lot of buckets to move and sort! We could have used the students all day because the two hours of time was not enough. The job was finished by myself and others including Trevor, Herb, Christina, Jean, Jack, Jenna, and Justin during 2 days following. It was a lot of work but the students were super helpful in doing the majority of the moving and now gathering data about each deposit and processing matrix will be much easier.

We now have the more convenient ability to know exactly how many buckets have been produced from each box and each grid. Here's some results:

Number of buckets per completed box:
Box 5b - 541
Box 7B - 267
Box 10A - 191
Box 10B - 91

For boxes still in progress:
Box 1 - 428
Box 7a - 279
Box 14 - 71

This gives a grand total of 1868 buckets produced in the past 2 years, 1724 of which were moved that day. That is an average of 74720 pounds (37 tons) of matrix that has been excavated out of Project 23 over the past 2 years. With 19 boxes left to finish that could mean about 100 more tons of matrix left to go.

Many thanks to all of those involved!

Introducing Box 14

Excavation of deposit 14 has been underway for almost 2 months now and has been very fruitful, as expected, due to what we have already seen in the amount of spill-over fossils that were put in buckets when the deposit was removed from the ground, as demonstrated here by Andie in a previous blog. But before we could poke our dental picks in the top asphaltic sugar sand already showing signs of large bone we had to transform the highly awkward box into something we could work with.

This is how it came to us, after protective tarp removed



The actual deposit is the darker colored sediment in the center. It fell apart when they were trying to excavate it and came to us wrapped with a few boards and metal bands, then plastic, and then supported by tons of the sterile "fill" dirt within the space of the tall box.



Box excavation preparation included cutting the metal bands that crossed over the top of the box, assembling scaffolding, removing front top board so the public can see us work, affixing handrails for easier boarding, setting up a shade canopy, and determining grid lines, and then box 14 was ready for digging!



The fossiliferous asphaltic sugar sand midsection of the deposit is relatively easy to dig in. It softly peels and crumbles away from the bone. We never have it completely easy though, as within it there are also spots of hard oxidized asphalt as well as bones that have already been fractured. Given that the deposit was disturbed upon excavation we also have not been taking three point orientation measurements of bones as they are believed to be disrupted from their original position. The only data thus far taken has been the grid and level that the fossil is found in.

Included in what we have found so far:

2 large hervibore vertebrae including sloth

1 coyote skull

1 dire wolf skull, tibia, radius

2 juvenile saber-toothed cat mandibles

lots of bird - including golden eagle skull, teratorn sized limb bones, male
turkey, and hawk

"lots of turtle" - according to Trevor there are at least 3 individuals

pieces of juvenile mastodon skull including a maxilla with teeth that
indicate its young age, possibly younger than any mastodon in the RLB
collection, along with a tibia

Meet "Snuffleupagus" or "Dumbo"

field photo


after some cleaning by Henry


Also, here's an example of what the main fossil deposit in 14 looks like


and the bird beak I found (my first), which is eagle sized


and the perfect furcula from a medium sized hawk that Michelle found


Deposit 14 has been worked down two levels and in order to continue we
have started removing fill dirt so that we can remain excavating from the deposit's side. Last week bucket by bucket we removed over a ton of fill. Literally. Thank you Sunday volunteers Karin Rice, Bruce Fischer, and Katelynn Simpson for being awesome dirt movers!

Now this is 14's current look


In other P23 news the reopening of the rather non-fossiliferous deposit 7a has yielded 3 horse cervical vertebrae and progress has been excellent in box 1. More updates are to come!!!