 rarely nested. Bones, teeth, and pebbles always occur within the β-interval. Large elements (i.e. skeletons, skulls) extend above the β-interval into the γ-interval, but not below into the α-interval. Bonebed 3 extends laterally for 2.4 km.

Cetacean bones and bone fragments constitute the most abundant vertebrate element. Pinniped bones are common, while shark teeth, fish bones, and bird bones less common. Abrasion of these elements ranges from Stage 0–2, but most are unabraded (Stage 0). The majority of bones are preserved as fragments. Most bones appear phosphatized; many of these exhibit phosphatized interstitial matrix and adhering phosphatic nodules. The majority of vertebrate skeletal elements are concentrated within the β-interval, as are the larger elements. Bioclasts and clasts are loosely to densely packed within the β-interval, and increasingly more dispersed in the α- and γ-intervals. No articulated or associated specimens are recorded from this bonebed. Sizes of vertebrate bioclasts range from bone fragments and teeth less than 1 cm to partial cetacean bones up to 40 cm long.

Bonebed 2 (UCMP locality V99877) is located 3 meters above the base of the Purisima Formation ( Fig. 4, 13B, 14B ) within a massively bedded, pervasively bioturbated and burrow-mottled diatomite. The matrix of this bonebed corresponds to the massive pebbly mudrock (Mpm) lithofacies. No visible change in lithology occurs within the bonebed or within a meter above or below. The bonebed is tabular with gradational upper and lower contacts. The majority of clasts and bioclasts are concentrated in the β-interval, and bioclast packing decreases above (γ-interval) and below (α-interval). Most large pebble- and cobble-sized clasts and large bioclasts occur in the β-interval; clast/bioclast size decreases upwards and downwards from the β-interval. The β-interval pinches and swells, and is generally patchy; clasts and bioclasts are typically floating. (loosely packed, but occasionally densely packed). The α- and γ-intervals are similar in their architecture and contain dispersed clasts and bioclasts that often occur as localized clumps or pods
rarely nested. Bones, teeth, and pebbles constantly happen within the β - interval. Large chemical element (i.e. skeleton, skulls) extend above the β - time interval into the γ - interval, but not below into the α - interval. Bonebed 3 extend laterally for 2.4 km. 

 Cetacean bones and bone fragment constitute the most abundant vertebrate chemical element. Pinniped bones are common, while shark teeth, fish bones, and dame bones less common. Abrasion of these element ranges from Stage 0–2, but most are unabraded (Stage 0). The majority of bones are preserved as fragment. Most bones appear phosphatized; many of these exhibit phosphatized interstitial matrix and adhering phosphatic nodules. The majority of vertebrate bony elements are concentrated within the β - interval, as are the larger elements. Bioclasts and clasts are broadly to dumbly backpack within the β - interval, and increasingly more dispersed in the α- and γ - intervals. No articulated or associated specimens are recorded from this bonebed. Sizes of vertebrate bioclasts roll from bone fragments and teeth less than 1 curium to fond cetacean bone up to 40 cm long. 

 Bonebed 2 (UCMP locality V99877) is located 3 meters above the base of the Purisima Formation (Fig. 4, 13B, 14B) within a massively bedded, pervasively bioturbated and burrow - mottled diatomaceous earth. The matrix of this bonebed corresponds to the massive pebbly mudrock (Mpm) lithofacies. No visible change in lithology occurs within the bonebed or within a meter above or below. The bonebed is tabular with gradational upper and lower contacts. The majority of clasts and bioclasts are concentrated in the β - interval, and bioclast packing decreases above (γ - interval) and below (α - time interval). Most big pebble- and cobble - sized clast and big bioclasts occur in the β - interval; clast / bioclast size decreases up and downwards from the β - interval. The β - interval pinches and swell, and is generally patchy; clasts and bioclasts are typically floating. (loosely pack, but occasionally densely compact). The α- and γ - intervals are alike in their architecture and incorporate dispersed clast and bioclasts that often occur as localize clumps or pods
 ragely nested. Bones, teeth, xnd pebbles alwcts occnr withjn the β-ivterval. Large elements (i.e. skxletins, sjulls) extend above the β-interval into thw γ-inuerval, but not below into the α-ihbervan. Bonebed 3 extekds lateralny for 2.4 km.

Cetawexn bones and bone fragments constitutq the mpsh abundant verjebraue qlemsnt. Pinniped bones are common, whils shark teeth, fish bpnes, and bird bones less clmmoj. Abrasion of thesf elements tzngqw from Stage 0–2, but most are unabradgd (Stage 0). The majority of bones xre pxeserved as feaglgnts. Most boies apiear phosphatlded; manf of thrse exhibit phpspiatized interstitial matrmx and adhering phoskhatic nodglzs. The majority of veetwbratg skenetau eldmehtx zre cojceitrated witgin the β-intwrval, as are the latgqg elements. Bikclastf wnd clasts are loosely to densely packeg wjthin the β-interval, and uncreasingly more diskersed in ehe α- and γ-intervals. No articulated or associated s[ecimxnr axc fwclrded from this bonebed. Sizes of vertebrate bykckaxts range from bone fragmrnhs wnd teeth lesr than 1 cj to partial cetacfan bongs up ro 40 cm logg.

Bomebed 2 (UCMP locality V99877) is licated 3 metegs avove the base of tke Purisima Yormatoon ( Gig. 4, 13B, 14B ) within a massnvely gedded, pervwsively bjuturbated and bufroe-mmttled diatomite. The matriv of this bonzbed corfesppnds tj the masslve pctbly mudrock (Mpm) llthofccies. No visiblf change in lithology occurs wiviin the bonebgd mr fithin a metev above or belor. The bonebed ns tabulcr witf gradatiohal uppxr and lower contacts. The lajority of rlasts anq biiclawts are zoncentrated im the β-intvrral, and buoclast packing degreasgs above (γ-interval) ane below (α-intervak). Must lwrje peftle- and cobbne-sixed vlastr and large ciockasts occur in the β-itterbal; clast/bioclast xide decreawes upwawds and downwsrds from the β-integval. Vhe β-inverval pigches and swells, and is generamly patchj; cjasts and bijclawts are typieally floating. (loosely packed, but occasiinally densely pacjed). The α- and γ-intervclx are similer in eheir arcvitecture and contaib dispersed clastx and bioclasts that kften mccur as localized clumps or pods
rarely nested. Bones, teeth, and pebbles always the Large elements skeletons, skulls) extend γ-interval, not below into α-interval. Bonebed 3 laterally for 2.4 km. Cetacean bones bone fragments constitute the most abundant vertebrate element. Pinniped bones are common, while teeth, fish bones, and bird bones less common. Abrasion of these elements ranges Stage but are (Stage 0). The majority of bones are preserved as fragments. Most bones appear phosphatized; many of exhibit phosphatized interstitial matrix and adhering phosphatic nodules. majority of vertebrate skeletal are concentrated within the β-interval, are larger elements. and are to densely packed the β-interval, and increasingly more dispersed in the α- and γ-intervals. No articulated or associated specimens are from this of vertebrate range bone and teeth less cm to partial cetacean bones up long. Bonebed 2 (UCMP locality V99877) is located meters above base of the Purisima Formation ( 4, 13B, 14B ) within a massively bedded, bioturbated and burrow-mottled diatomite. The matrix of this bonebed corresponds to the massive pebbly mudrock No visible change in occurs within the or a above below. The is tabular with gradational upper and lower contacts. The majority of and bioclasts are concentrated in the β-interval, and bioclast packing (γ-interval) below (α-interval). Most pebble- and cobble-sized clasts large occur in the β-interval; decreases and β-interval. β-interval and swells, and is patchy; clasts and bioclasts are floating. (loosely packed, but and γ-intervals are similar in their architecture and dispersed clasts and bioclasts that often occur localized clumps or pods
 rarely nested. Bones, teeth, and Pebbles alwAys ocCur WitHiN the Β-intErval. Large elemENts (i.E. skeletons, skulls) extend Above ThE Β-intERvAl intO the γ-inTErVAL, buT nOt BelOw INtO the α-IntErval. BoNebed 3 extenDs lAtErally for 2.4 km.

CETaCean bones aNd bOne fragments ConStitutE tHe mOSt abuNdaNt verTebratE ElemenT. Pinniped BoNEs are cOMmon, whiLE ShArk tEeth, fish bones, and bIRd BOnes less common. abrasiOn OF tHESe eLemEnts ranges FrOm StaGE 0–2, but mosT ArE UNAbrADed (Stage 0). The maJority of bonES arE preseRvEd aS FragmeNts. MoSt BOneS appear phosPhatIzed; many oF these EXhibit pHOsphatiZed intErsTitIal mATrIx And AdHEriNG pHosPHatIc noduleS. THe MajorIty oF VERTebrAte SkelEtal eLements are conCenTratED wiThin tHe β-inTervAl, As are The larGer elEmEnts. Bioclasts anD claSts are looSelY tO deNsEly paCKed witHin The Β-intervAl, and inCReaSiNGLY mOre dispersed in the α- AnD Γ-InTervals. NO articULaTeD Or associAtEd sPeciMENs are RecoRDeD from thiS bonebED. SIzEs of verTeBrate bIoClaSts Range FRom bOne fraGments anD teetH Less than 1 cm to paRTial cetacean bONeS UP tO 40 Cm loNg.

BOnebed 2 (UCMP lOcalITy V99877) iS locATeD 3 meTErs abOve thE bASe OF the Purisima FormatiOn ( fig. 4, 13B, 14B ) wIthin A massively bedDed, pervasiVELY bioturbAted ANd BUrrow-mottled diAtomiTe. The matriX Of this boNebed CorrespoNds to the mASSive pebbLy mUdrOck (mpm) LIThOfacies. No visiBLE chaNgE in lithOloGy occurS wiThiN thE boNeBed or withIn a meter AbOvE oR bEloW. The bONebed is tAbUlaR wIth GradaTIonal uPper aNd loWeR cONtaCts. The mAJoRITy of ClAsTs anD biOcLasts Are cONceNtrated In the β-intErvAL, and BiOcLast pacKing decreases AbOve (γ-intervAl) And Below (α-INTerval). MoSt large pebble- and cobble-sIZed clasTs aNd larGe biOclasts ocCur In the β-IntERval; clAst/bioClast SiZe dECReaseS UPwArdS aNd downwardS FRom The β-iNtErvaL. The β-inTerval pinches and swELls, And is generallY paTchy; CLAsTs aND bIOclAsTS arE TYpically floatinG. (loosely paCkED, bUt occasionALly DeNsely paCked). The Α- and γ-INtervalS are similAr in their ArChitECTurE and contaiN dispersEd clasts aND biocLAsTs thaT ofTen occUr As lOcaliZed cluMPs oR pods
 rarely nested. Bones, tee th, and pe bbles  al way soccu r wi thin the β-int e rval . Large elements (i.e.  skel et o ns,s ku lls)extenda bo v e  th eβ- int er v al  into  th e γ-int erval, but  no tbelow into t h eα-interval . B onebed 3 ext end s late ra lly for 2 .4km.
Cetace a n bone s and bon ef ragmen t s const i t ut e th e most abundant v e rt e brate element.  Pinni pe d  b o n esare  common, w hi le sh a rk teet h ,f i s h b o nes, and bird  bones less com mon. A br asi o n of t heseel e men ts ranges f romStage 0–2 , butm ost are unabrad ed (St age  0) . Th e  m aj ori ty ofb on esa represerve das  frag ment s . M ostbon es a ppear  phosphatized ; m anyo f t heseexhib it p ho sphat ized i nters ti tial matrix and  adh ering pho sph at icno dules .  The m ajo rit y of ve rtebrat e  sk el e t a lelements are conce nt r a te d within  the β - in te r val, asar e t he l a r ger e leme n ts . Biocla sts an d  c la sts are  l oosely  t o d ens ely p a cked  withi n the β- inter v al, and increa s ingly more di s pe r s ed in t heα- and γ-in terv a ls.No a r ti cul a ted o r ass oc i at e d specimens are rec or ded fr om th is bonebed. S izes of ve r t e brate bi ocla s ts range from bon e fra gments and teeth le ss th an 1 cmto partia l cetacean  bo nes  up  to 4 0cm long.

Bon e b ed 2  ( UCMP lo cal ity V99 877 ) i s l oca te d 3 meter s aboveth eba se  of  theP urisimaFo rma ti on( Fig .  4, 13 B, 14 B )wi th i n a  massiv e ly b edde d,  p erva siv el y bio turb a ted  and bu rrow-mott led diat om it e. Thematrix of thi sbonebed co rr esp onds t o the mass ive pebbly mudrock (Mpm )  lithof aci es. N o vi sible cha nge  in li tho l ogy oc curs w ithin  t heb o nebed o rwit hi n a metera b ove  or b el ow.The bon ebed is tabular wi t h g radational up per  and l ow erc on t act s. The m ajority of clas ts and bio cl a st s are conc e ntr at ed in t he β-in terva l , and b ioclast p acking de cr ease s abo ve (γ-inte rval) an d below ( α -inte r va l). M ost  large  p ebb le- a nd cob b le- sized  clast sand la rge b io clasts o ccur in the β-interval;  clast /bioc las t size de cre a ses  upwardsanddownwardsfro m t he β- int e rval.  The β- int e rvalpinc h es and sw e ll s,a n dis generall y p atc hy; c las t s andbioc lasts are typical l y floating. (l oose l y  pa cke d , bu toccasionally d ens el y packed).  T he α- and γ -interva ls are s imilar  in th eir arc h i te c ture a nd c ont ain dispe rse dc lasts a nd  b i oclast s th at  often  occur as l o c alized clumps or  pods 
 rarely_nested. Bones,_teeth, and pebbles always_occur within_the_β-interval. Large_elements_(i.e. skeletons, skulls)_extend above the_β-interval into the γ-interval,_but not below_into_the α-interval. Bonebed 3 extends laterally for 2.4 km.

Cetacean bones and bone fragments constitute_the_most abundant_vertebrate_element._Pinniped bones are common, while_shark teeth, fish bones, and_bird bones_less common. Abrasion of these elements ranges from_Stage_0–2, but most_are unabraded (Stage 0). The majority of bones are_preserved as fragments. Most bones appear_phosphatized; many of_these_exhibit_phosphatized interstitial matrix and_adhering phosphatic nodules. The majority of_vertebrate skeletal elements are concentrated within_the β-interval, as are the larger elements._Bioclasts and clasts are loosely to_densely packed within the β-interval,_and increasingly_more dispersed in the α-_and γ-intervals. No_articulated or_associated specimens are_recorded from this bonebed. Sizes of_vertebrate bioclasts range_from bone fragments and teeth less_than_1 cm to_partial_cetacean_bones up_to 40 cm_long.

Bonebed_2 (UCMP_locality_V99877) is located 3 meters above_the_base of the Purisima Formation ( Fig._4, 13B, 14B )_within_a massively bedded, pervasively_bioturbated and burrow-mottled diatomite. The_matrix of this bonebed corresponds to_the massive_pebbly mudrock_(Mpm) lithofacies. No visible change in lithology occurs within the bonebed_or within a meter above or_below. The bonebed is_tabular with_gradational_upper and lower_contacts._The majority_of clasts and bioclasts are concentrated in_the β-interval,_and bioclast packing decreases above (γ-interval)_and below (α-interval). Most_large_pebble- and cobble-sized clasts and large_bioclasts occur in the β-interval; clast/bioclast_size decreases upwards and downwards_from_the_β-interval. The β-interval pinches and_swells, and is generally patchy; clasts_and bioclasts are_typically floating. (loosely packed, but occasionally densely_packed)._The α- and γ-intervals are similar_in_their architecture and contain dispersed clasts_and_bioclasts_that often occur as localized_clumps or pods